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True [87]
3 years ago
8

PLEASE HELP (look at pictures)

Mathematics
1 answer:
Vladimir [108]3 years ago
6 0
<h2>Answer:</h2>

This is a theorem called Converse of Alternate Exterior Angles that states that <em>if two lines are cut by a transversal and the alternate exterior angles are congruent, then the lines are parallel</em>. Moreover, this theorem is based upon the corresponding Angles Converse Postulate that states that<em> if two lines are cut by a transversal and corresponding angles are congruent, then the lines are parallel. </em>We don't need to prove this postulate, it's assume to be true. So our goal is to get corresponding angles congruent in order to use the corresponding Angles Converse Postulate,

1.  

Reason: Given  

Statement: \angle1\cong\angle2

2.  

Reason: Def of vertical \angle s

Statement: \angle1\:and\:\angle3 \ are \ vertical

3.  

Reason: Def of vertical \angle s

Statement: \angle1\cong\angle3  

4.

Reason: Transitive Property

Statement: \angle2\cong\angle3

5.  

Reason: corresponding Angles Converse Postulate

Statement: p\parallel q

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