Topic 3 Parallel and Perpendicular Lines. How do we know when two lines are parallel Their slopes are the same The slope is the . SameSide Interior Angles . ne Lines A and C are neither Determine if these lines are parallel, perpendicular, or neither. Parallel and perpendicular line segments. If a triangle is a right. Parallel and Perpendicular Lines Proofs. The direction vectors of the lines can be written as v (1, m) and v (1, m). The student response demonstrates an exemplary understanding of the Geometry concepts involved in proving the slope criteria for parallel and perpendicular lines and using them to solve geometric problems. If two lines are parallel to a third line, then the two lines are parallel. Angles that form a linear pair are supplementary. Transversal. Intro to 2 Column Geometry Proofs Congruent Angles Parallel Lines & Skew Lines, Angles formed by a Transversal Parallel Lines & Transversal Angles Proving Lines Parallel Parallel & Perpendicular Lines Proof Angles of Triangles and Parallel Lines Graphing Lines in Slope-Intercept form ymxb Equations of Lines and Graphing. Worksheets are Proofs with perpendicular lines, Honors geometry chapter 3 proofs involving parallel and, Geometry beginning proofs packet 1, Parallel and perpendicular lines, Geometry proofs and postulates work, Geometry proof practice answers, Math work, Chapter 3 parallel and perpendicular lines. Draw a new line from a point on the original line to the point above the original line and construct another new line that will be parallel to the original one by making the corresponding angles congruent using the protractor postulate. Problem 33. And, horizontal lines are perpendicular to vertical. increasing slope. The lines are PARALLEL Consecutive interior angles are supplementary. Nov 17, 2021 For the perpendicular case, draw a parallel line through the point not on the original line, then draw a line perpendicular to the newly drawn parallel line by using the protractor postulate, which then must also be perpendicular to the original line. Perpendicular lines intersect at right angles to one another. SameSide Interior Angles . pf2 · 3. some of the worksheets displayed are geometry unit 3 homework answer key, unit 2. 9, HSG-CO. If two coplanar lines are perpendicular to the same line, then the two lines are (perpendicular, parallel, skew) to each other. 2 More Reads. 9x-7 3x 29 6 Write the converse of each conditional statement. 2 Substitute the value for m into the equation of a new straight line. inductive reasoning. 2 Substitute the value for m into the equation of a new straight line. Find the slope of the two lines . Worksheets for teaching coordinate grids, ordered pairs, and plotting points. 1 Parallel Lines and angle relationships Pg 78 s 15-20 20 7. Jan 11, 2023 Perpendicular lines Coplanar lines that are not parallel must intersect or cross each other. Coordinate methods; c. Proofs Parallel Perp Lines Key - Mr. For example, the opposite sides of a square and a rectangle have parallel lines in them, and the adjacent lines in the same shapes are perpendicular lines. ne Lines A and C are neither Determine if these lines are parallel, perpendicular, or neither. The student will use the relationships between angles formed by two lines cut by a transversal to. Proof, Parallel and Perpendicular Lines. Two parallel planes and a line If two planes are perpendicular to the same line, then they&39;re parallel to each other. 9 and 3. See back of book. Draw the first line from the origin to (-2, 2). 3 Prove Lines are Parallel. Draw two parallel lines and a transversal on the whiteboard to illustrate this Explain that the alternate interior angles are represented by two angle pairs 3 and 6, as well as 4 and 5 with separate colors respectively. 23 Let &92; k, l, n&92; be three lines with &92; k&92;parallel l&92; and &92; l&92;parallel n&92; . Nov 7, 2016 1 Answer. Exercise 9. com 1. Lines mand nare parallel when the marked corresponding angles are congruent. Look past formal definitions and discover the properties and relationships among geometric figures for. Parallel lines have equal slopes, m1 m2. 1 Lines and Angles 3. Exploring Parallel and Perpendicular Lines Pencil Paper Activity will be used to learn how the slopes of parallel and. They can intersect at any angle, but when the lines intersect at exactly 90 they are perpendicular lines. C) 6. Prove statements about parallel lines using two-column proofs 1. Prove 3 13. If we see a few real-world examples, we can notice parallel lines in them, like the opposite sides of a notebook or a laptop, represent parallel lines, and the intersecting sides of a. We know that if we have two lines that are parallel-- so let me draw those two parallel lines, l and m. You will extend your knowledge of the characteristics of angles and parallel and perpendicular lines and explore practical applications involving angles and lines. If two lines intersect making congruent adjacent angles, then the . The axes of a coordinate plane is an example of two perpendicular lines. SameSide Interior Angles . Table of Contents. Giveh the following information, determine which lines it any, are parallel. Perpendicular Lines. x Divide each side by 3. Worksheets are Proofs with perpendicular lines, Honors geometry chapter 3 proofs involving parallel and, Geometry beginning proofs packet 1, Parallel and perpendicular lines, Geometry proofs and postulates work, Geometry proof practice answers, Math work, Chapter 3 parallel and. Parallel and perpendicular line segments. 4 Find and Use Slopes of Lines. Pythagorean Theorem. Exploring Parallel and Perpendicular Lines Pencil Paper Activity will be used to learn how the slopes of parallel and. Prove statements about parallel lines using two-column proofs 1. This has no solution if and only if m m and q q . var geometry new THREE. Pythagorean Theorem. These theorems are as follows Opposite Sides of a Parallelogram are congruent, Opposite Angles of a. from p. See back of book. We can solve it using the "point-slope" equation of a line y y 1 2(x x 1) And then put in the point (5,4) y 4 2(x 5). Proof for Slope Criteria for Perpendicular Lines. Two nonvertical lines in the same plane, with slopes m1 and m2, are perpendicular if the product of their slopes is 1 m1 m2 1. Level up on the above skills and collect up to 480 Mastery points Start quiz. x-30 4x 80 180 26 4. Parallel lines &92;big(&92;parallel lines &92;big) are coplanar lines that do not intersect. Proof 3. Ans We know that to find the slope of the line (4x 5y 12), We needed to convert the string to (y mx b) which is the slope-intercept form. 1 Proving Theorems on Parallel and Perpendicular Lines 1. IXL - Proofs involving parallel lines I (Geometry practice) Learning Assessment Analytics Inspiration Membership Math Language arts Science Social studies Spanish Recommendations Skill plans IXL plans Textbooks Test prep Awards First time here Pre-K through 12th grade Sign up now Keep exploring. Or, Slopes are negative reciprocals. The gradient of the given line is -3, so the gradient of the. 23 Let &92; k, l, n&92; be three lines with &92; k&92;parallel l&92; and &92; l&92;parallel n&92; . Proof 4. Properties of Perpendicular Lines Perpendicular lines always intersect at right angles. Two lines parallel to the same line are parallel to each other. Parallel Lines, Transversals, and Angles What's On this page you can read or download homework 5 slope graphing lines review gina wilson in PDF format 3 Prove Lines are Parallel Unit 2 Logic and Proof Unit 3 Parallel and Perpendicular Lines Unit 4 Congruent Triangles Unit 5 Relationships in Triangles Unit 6 Similar Triangles Unit 7 Quadrilaterals Unit 8 Right. Generalization based on inductive reasoning. Because we have drawn our transversals as horizontal and vertical lines, angle ACB and. How do we know when two lines are parallel Their slopes are the same The slope is the . m riserun Change in yChange in x (y2-y1)(x2-x1), y mx b, In a coordinate plane, two nonvertical lines are parallel if and only if they have the same slope. You will investigate the concept of proof and discover the importance of proof in mathematics. Determine the value of angles formed by a transversal and parallel lines. 4 7 practice geometry parallel and perpendicular lines > alqurumresort. Sections Covered 3. The lower line intercepts the xx axis at 0. Worksheets are Proofs with perpendicular lines, Honors geometry chapter 3 proofs involving parallel and, Geometry beginning proofs packet 1, Parallel and perpendicular lines, Geometry proofs and postulates work, Geometry proof practice answers, Math work, Chapter 3 parallel and perpendicular lines. 4 and 6 14. Here, the gradient of the line is 1 5 51. If two coplanar lines are each perpendicular to the same line, then they are. For these vectors to be perpendicular, their dot product must vanish, that is 1 m m 0. 1-2-2 Identify and name parts of a circle. Name Date Period Choose the word(s) that best completes the statements. so if one is 6x 24 and the other is 2x 60 we can create an equation 6x 24 2x 60. Directions Prepare a formal proof for each problem. 2x 5 27 11 2. Draw the first line from the origin to (-2, 2). For these vectors to be. Using this angle, the vectors can be split into their horizontal and vertical components using the trigonometric functions sine and cosine. Hint Think of "Opposite, reciprocals. 9x-7 3x 29 6 Write the converse of each conditional statement. Example 3-2-7 Use the properties of parallel lines to find the value of and. Identify the Basic Elements. Parallel Lines Theorem Calculus Absolute Maxima and Minima Absolute and Conditional Convergence Accumulation Function Accumulation Problems Algebraic Functions Alternating Series Antiderivatives Application of Derivatives Approximating Areas Arc Length of a Curve Area Between Two Curves Arithmetic Series Average Value of a Function. complementary), then the lines are parallel. For these vectors to be. When two lines intersect, the angle between them is defined as the angle through which one of the lines must be rotated to make it coincide with the other line Slopes of parallel and perpendicular lines worksheet 4 answers Section 3-2 Angles and Parallel Lines Exercise 3 Language work collocations 2 For x 1 v 1 x 2 v 2 x 3 v 3 x 4 v 4. Choose 1 answer When a transversal crosses parallel lines, alternate interior angles are congruent. The student response demonstrates an exemplary understanding of the Geometry concepts involved in proving the slope criteria for parallel and perpendicular lines and using them to solve geometric problems. 00 Google Drive folder In this READY TO GO digital activity, students will use moveable pieces to write proofs about parallel and perpendicular lines. Nov 7, 2016 1 Answer. parallel -1 Module 4 205 Lesson 5 4. Nov 7, 2016 1 Answer. Line O is perpendicular to Lines F and X because it has the negative reciprocal of 3 4. 2 Parallel Lines and transversals Learning Check Solutions. 9 and 3. 3) <A <B 3) Substitution Postulate Part 2 Proving Lines Parallel To prove two lines parallel we can use the converse of many of our theorems involving parallel lines. How do we know when two lines are parallel Their slopes are the same The slope is the . Determine if lines are intersecting, parallel, or skew. Parallel Lines Theorem Calculus Absolute Maxima and Minima Absolute and Conditional Convergence Accumulation Function Accumulation Problems Algebraic Functions Alternating Series Antiderivatives Application of Derivatives Approximating Areas Arc Length of a Curve Area Between Two Curves Arithmetic Series Average Value of a Function. With help, a partial understanding of some of the simpler details and process. PROOF AND PERPENDICULAR LINES WORKSHEET. The lower line intercepts the xx axis at 0. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Their product is -1 Watch this tutorial and see how to determine if two equations are perpendicular. Created by Sal Khan. Solid Shapes. Jan 11, 2023 Slope of parallel lines. Nov 17, 2021 For the perpendicular case, draw a parallel line through the point not on the original line, then draw a line perpendicular to the newly drawn parallel line by using the protractor postulate, which then must also be perpendicular to the original line. You will extend your knowledge of the characteristics of angles and parallel and perpendicular lines and explore practical applications involving angles and lines. 1-2-2 Identify and name parts of a circle. Another way of saying this is the slopes of the two lines must be negative reciprocals of each other. EXAMPLE 4 Given the following information, determine which lines, if any, are parallel. Proofs involving parallel lines 1 and 2. If a pair of corresponding angles are congruent, then the lines are parallel. Here it is. Find the slope of the line parallel to the line (4x 5y 12). This has no solution if and only if m m and q q . Equations of Parallel and Perpendicular Lines The equation of a straight line is represented as y ax b which defines the slope and the y-intercept. Unit 1 Proof, Parallel and Perpendicular Lines. Parallel and perpendicular lines can be identified on the basis of the following properties Properties of Parallel Lines Parallel lines are coplanar lines. inductive reasoning. Proof 6. Report an issue. Displaying all worksheets related to - Proofs Of Parallel And Perpendicular Lines. Proofs involving lines with slopes that are equal or opposite reciprocals of each other. My approach is simple. Jan 11, 2023 Perpendicular lines Coplanar lines that are not parallel must intersect or cross each other. Perpendicular lines are intersecting lines. Answer The given line equation is. Lewis M. so if one is 6x 24 and the other is 2x 60 we can create an equation 6x 24 2x 60. Uniqueness again can be shown in many ways. 73, and the following postulates. 2. What are the 4 ways that we can prove lines to be parallel slope. Find the equation of the line that is parallel to y 2x 1 ; and passes though the point (5,4) The slope of y2x1 is 2. Report a problem 7 4 1 x x y y. 20 Qs. I introduce 2 more theorems that can verify that 2 lines are parallel. For these vectors to be. 2 Proving Lines are parallel Pg 83 &x27;s 12-16 21 7. Proof 6. Perpendicular lines are lines in the same plane that intersect at right angles (90 degrees). Three parallel planes If two planes are parallel to the same plane, then they're parallel to each other. You will extend your knowledge of the characteristics of angles and parallel and perpendicular lines and explore practical applications involving angles and lines. 2 Substitute the value for m into the equation of a new straight line. the rate of change of a line , represented with the variable m. The direction vectors of the lines can be written as v (1, m) and v (1, m). t Identify each pair of angles as alternate interior, alternate exterior, corresponding, or consecutive interiorangles. Common Core State Standards HSG-CO. Geometric Proof If two distinct lines are parallel, the slopes of the lines are equal. They didn&39;t struggle with the equations of parallel and perpendicular lines. Perpendicular Lines. 9 Prove theorems about lines and angles. 1 and 5 13. At both of the schools where I&39;ve taught, my students haven&39;t learned equations of parallel and perpendicular lines in Algebra 1. Nov 7, 2016 1 Answer. line A line B line C line D Lin es ith B er an d D ar e. Proof for Slope Criteria for Parallel Lines Let&39;s look at the angles in the triangles we have created. 5, 0) and the y axis at (0, -1). inductive reasoning. Search Gina Wilson Parallel Line Proofs. They involve the formation of parallel and perpendicular lines given a. Created by Sal Khan. Remember this important pattern If two lines have the same slope, they are parallel. Construct perpendicular lines November 13, 2018 Geometry 3. perpendicular or. 1 and 5 13. Here &x27;a&x27; represents the slope of the line. While parallel lines have the same slope, lines that are perpendicular to each other have opposite reciprocal slopes. Lines that do not intersect are parallel lines. Draw two parallel lines and a transversal on the whiteboard to illustrate this Explain that the alternate interior angles are represented by two angle pairs 3 and 6, as well as 4 and 5 with separate colors respectively. Look past formal definitions and discover the properties and relationships among geometric figures for. This is a group activity that will help students practice identifying parallel and perpendicular lines. Directions Prepare a formal proof for each problem. Directions Prepare a formal proof for each problem. Both lines have a slope m 3 4 and thus are parallel. Vertical lines will not be considered since their slopes are undefined and cannot be considered equal. Perpendicular lines intersect at 90 degrees. Let the fun begin. Parallel lines have equal slopes, m1 m2. Parallel and perpendicular line calculator. Feb 12, 2021 &183; Parallel and Perpendicular Lines Mathematical Practices. Vertical angles are congruent. Perpendicular lines are intersecting lines. Alternatively, perpendicularity can be defined as the least distance direction from a point to line. Line 2 through (3, 0) and (0, 1) SOLUTION b , transparencies and geometry software; describe PROPERTY 1 When two parallel lines are cut by a transversal, then corresponding angles are congruent Name two lines perpendicular to FG&(The number of ways you can choose 2 parallel lines from 4 This is the equation of required line The number of ways you can choose 2. x 4 y 16, x - 4 y 32, 2 x 8 y 16, 4 x y 8 Lin es Ca nd ith Da re Lines B and C are parallel ne Lines A and D are perpendicular. We can solve for m1 and obtain m1 1 m2. Two nonvertical lines in the same plane, with slopes m1 and m2, are perpendicular if the product of their slopes is 1 m1 m2 1. Proof of . Angles that form a linear pair are supplementary. Report an issue. The lines are perpendicular to the same line. from p. In Activities 2. com - Geometry Help - YouTube www. One answer is the line that is parallel to the reference line and passing through a given point. The direction vectors of the lines can be written as v (1, m) and v (1, m). This has no solution if and only if m m and q q . craigslist in riverside ca, surge looking for you lezhin characters
3 Prove Lines are Parallel. . Parallel and perpendicular lines proofs
If the lines are parallel horizontal lines, the slopes are both zero. Proving Lines Are Parallel - MathHelp. x 4 y 16, x - 4 y 32, 2 x 8 y 16, 4 x y 8 Lin es Ca nd ith Da re Lines B and C are parallel ne Lines A and D are perpendicular. It means we need to need to solve for (y). There are two more methods of proving lines are parallel. 4 - Proofs with Perpendicular Lines. At both of the schools where I&39;ve taught, my students haven&39;t learned equations of parallel and perpendicular lines in Algebra 1. A parallel perpendicular answer key is usually found on the second page of the worksheets or on a separate key. parallel -1 Module 4 205 Lesson 5 4. Jan 11, 2023 Slope of parallel lines. 2 Proving Lines are parallel Pg 83 s 12-16 21 7. Vertical angles are congruent. I lines slopes -3 Find an equation of a line perpendicular to 3x2 6, passin - -3(-1) b 53b Find an equation of a line through (-2, 7) with slope of. Find rays, lines, and line segments that are either parallel or perpendicular to each other. 2-1-1 Make conjectures by applying inductive reasoning. IXL - Proofs involving parallel lines I (Geometry practice) Learning Assessment Analytics Inspiration Membership Math Language arts Science Social studies Spanish Recommendations Skill plans IXL plans Textbooks Test prep Awards First time here Pre-K through 12th grade Sign up now Keep exploring. Best Match Video Recommendation. then If two lines are perpendicular to the same line, then they are parallel. 2 Properties of Parallel Lines 3. perpendicular lines How can I use slope in coordinate proofs Key Vocabulary Parallel. Slope of perpendicular lines. You will investigate the concept of proof and discover the importance of proof in mathematics. Solved Examples Parallel and Perpendicular Lines. If two lines are perpendicular and neither one is vertical, then . that passes through the point (2, - 1) and is perpendicular to the given line. Because we have drawn our transversals as horizontal and vertical lines, angle ACB and. . You will extend your knowledge of the characteristics of angles and parallel and perpendicular lines and explore practical applications involving angles and lines. Equations of parallel perpendicular lines you high school geometry common core g gpe b 5 teacher notes patterson finding and math academic support center 4 05 flashcards quizlet from graph ytic khan academy the distance a point to line proof formula graphs in linear lesson transcript study com proofs for segments or rays have negative reciprocal slope. And, horizontal lines are perpendicular to vertical. You can use some of these properties in 3-D proofs that involve 2-D concepts, such as proving that you have a particular quadrilateral or proving that two triangles are similar. Parallel lines do not intersect each other. Progress. t Identify each pair of angles as alternate interior, alternate exterior, corresponding, or consecutive interiorangles. Here it is. Figure 3. a statement that has. from p. 2-1-1 Make conjectures by applying inductive reasoning. Draw a square with 5 cm sides. The coordinates of their intersection are given by the solutions of the system. Search Gina Wilson Parallel Line Proofs. Similar to the parallel postulate, the perpendicular postulate can be used to prove if lines are perpendicular or not. Find a counterexample for the following statement. 6 Prove Theorems About Perpendicular Lines CC. 4 and 6 14. Proof outline for theorem 3 - 10 We&x27;ll need the following definition Parallel lines (lines) are coplanar lines that do not intersect. 4 Find and Use Slopes of Lines. an argument that uses logic to show that a conclusion is true. They involve the formation of parallel and perpendicular lines given a. Parallel Lines Theorem Calculus Absolute Maxima and Minima Absolute and Conditional Convergence Accumulation Function Accumulation Problems Algebraic Functions Alternating Series Antiderivatives Application of Derivatives Approximating Areas Arc Length of a Curve Area Between Two Curves Arithmetic Series Average Value of a Function. Prove 3 13. AI Recommended Answer Line 1 y-2x2 1. 4B 3. Proof 3. Parallel Lines Theorem Calculus Absolute Maxima and Minima Absolute and Conditional Convergence Accumulation Function Accumulation Problems Algebraic Functions Alternating Series Antiderivatives Application of Derivatives Approximating Areas Arc Length of a Curve Area Between Two Curves Arithmetic Series Average Value of a Function. Worksheets are Using parallel lines in proofs, Proofs with parallel lines, Honors geometry chapter 3 proofs involving parallel and, Parallel lines proof work, Parallel lines and transversals work write all the, 3 parallel and perpendicular lines, Geometry beginning proofs packet 1, Unit 4 triangles part 1 geometry. Only one perpendicular line can be drawn through the given. Prove If a transversal is perpendicular to one of two parallel lines, it is perpendicular to the other line. Two-column geometric proofs Pg 70 s 4-8 Pg 71 s 9-16 19 7-Parallel and Perpendicular Lines 7. The lines are parallel. To use this activity in your classroom, you just need to print out enough copies of this Interactive Notebook Worksheet (Members Only). 1 Proving Theorems on Parallel and Perpendicular Lines 1. Proofs involving parallel lines 1 and 2. Search Gina Wilson Parallel Line Proofs. Geometry Worksheets. Unit 3 parallel and perpendicular lines homework 4 answer key answer 1) c d by. Statecalculate the gradient of the original straight line. Only one possible answer will be shown for each question. Prove If a transversal is perpendicular to one of two parallel lines, it is perpendicular to the other line. 5 Write and Graph Equations of Lines. The lines are parallel. Proof, Parallel and Perpendicular Lines. Two nonvertical lines in the same plane, with slopes m1 and m2, are perpendicular if the product of their slopes is 1 m1 m2 1. The slopes of perpendicular lines are opposite reciprocals of each other. Search Gina Wilson Parallel Line Proofs. We can solve for m1 and obtain m1 1 m2. Learn how to identify parallel and perpendicular lines. Prepare a formal proof for each problem. Any two vertical lines are parallel. We can solve for m1 and obtain m1 1 m2. If a plane is perpendicular to one of two parallel lines, then it&39;s perpendicular to the other. Perpendicular lines are lines in the same plane that intersect at right angles (90 degrees). 5 Write and Graph Equations of Lines. 8k plays. Slope of perpendicular lines. 3notes Proofs with Perpendicular Lines The Geogebra activity below helps underscore the fact that the distance from a point to a line is the length of the perpendicular segment from the point to the line. Track students&39; progress with hassle-free . Another answer is the line perpendicular to it, and. Lock&39;s Math Portal. Rules to identify parallel and perpendicular lines. 0 Know and use the vocabulary Identify the Basic Elements With help, a partial understanding of some of the simpler details and process LINES Intersecting, Parallel & Skew WORD or CONCEPT DEFINITION or NOTES EXAMPLE or GRAPHIC REPRESENTATION intersecting parallel skew coplanar. Determine if lines are intersecting, parallel, or skew. You will extend your knowledge of the characteristics of angles and parallel and perpendicular lines and explore practical applications involving angles and lines. Parallel lines &92;big(&92;parallel lines &92;big) are coplanar lines that do not intersect. Another way of saying this is the slopes of the two lines must be negative reciprocals of each other. Sections Covered 3. The equation of a line A A is given as 5yx10 5y x10. Proving Lines Parallel Parallel & Perpendicular Lines Proof Angles of Triangles and Parallel Lines Graphing Lines in Slope-Intercept form ymxb Equations of Lines and Graphing Rate of Change Slope & Point Slope Equation of Lines Equations of Parallel and Perpendicular Lines Congruent Polygons & Third Angle Theorem Congruent Triangles SSS SAS. west palm beach tax. Unit Overview In this unit you will begin the study of an axiomatic system, Geometry. For instance, consider the line If we want to find the equation of a line that is perpendicular to the given line. increasing slope. At both of the schools where I&39;ve taught, my students haven&39;t learned equations of parallel and perpendicular lines in Algebra 1. Choose 1 answer When a transversal crosses parallel lines, alternate interior angles are congruent. Skew lines are coplanar. How do we know when two lines are parallel Their slopes are the same The slope is the . Today&x27;s Activity Parallel Lines Proofs. a statement that has. Proving lines are parallel. When two lines intersect, the angle between them is defined as the angle through which one of the lines must be rotated to make it coincide with the other line Slopes of parallel and perpendicular lines worksheet 4 answers Section 3-2 Angles and Parallel Lines Exercise 3 Language work collocations 2 For x 1 v 1 x 2 v 2 x 3 v 3 x 4 v 4. In a coordinate plane, 2 nonvertical lines are parallel iff they have the same slope. Problem 33. Determine the value of angles formed by a transversal and parallel lines. 1-1-2 Identify and name angles. 8a-12 20 4 3. . trabajos en newark nj