2. George is using the figure below to prove that corresponding angles, Z3 and 27, are congruent. 21 34 6\5 78 He used the Linear Pair Postulate to determine m/6 + m27 = 180° and the Same Side Interior Angle Theorem to determine m23 + mZ6 = 180°. What could be the next valid step in his proof? A. Say that m26 + mZ7 = mZ3+ mZ6 because of the Transitive Property. B. Say that m26+ mZ7 = m/3 + mZ6 because of the Angle Addition Postulate. C. Say that m23+ mZ6 + mZ7 180° because of the Angle Addition Postulate. D. Say that mZ3+mZ6+ mZ7 180° because of the Definition of Supplementary Angles.

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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George is using the figure below to prove that corresponding angles, ∠3 and ∠7, are congruent. 
  

 

  
He used the Linear Pair Postulate to determine m∠6+m∠7=180° and the Same Side Interior Angle Theorem to determine m∠3+m∠6=180°.

2. George is using the figure below to prove that corresponding angles, 23 and 27, are congruent.
21
3 4
6\5
78
He used the Linear Pair Postulate to determine m6 + mZ7 = 180° and the Same Side Interior Angle
Theorem to determine m/3 + mZ6 = 180°.
What could be the next valid step in his proof?
A. Say that m26 + mZ7 = mZ3+ m/6 because of the Transitive Property.
B. Say that m/6 + mZ7 = mZ3 + mZ6 because of the Angle Addition Postulate.
C. Say that m/3+ mZ6+ mZ7
180° because of the Angle Addition Postulate.
D. Say that m/3+mZ6+ mZ7 = 180° because of the Definition of Supplementary Angles.
Transcribed Image Text:2. George is using the figure below to prove that corresponding angles, 23 and 27, are congruent. 21 3 4 6\5 78 He used the Linear Pair Postulate to determine m6 + mZ7 = 180° and the Same Side Interior Angle Theorem to determine m/3 + mZ6 = 180°. What could be the next valid step in his proof? A. Say that m26 + mZ7 = mZ3+ m/6 because of the Transitive Property. B. Say that m/6 + mZ7 = mZ3 + mZ6 because of the Angle Addition Postulate. C. Say that m/3+ mZ6+ mZ7 180° because of the Angle Addition Postulate. D. Say that m/3+mZ6+ mZ7 = 180° because of the Definition of Supplementary Angles.
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