# Geometry Help Please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

**Question description**

What is the reason for the third step in this proof?

Given: *a* parallel to *b*, and both lines are cut by transversal *t*.

Prove:angle 2 congruent to angle 7

1. *a* *parallel to b ---------------->*given

2. angle2 congruent to angle 3 ----------->Vertical Angles Theorem

3.angle 3 congruent to angle
6 ---------------> MISSING PROOF ?

4. angle 2 congruent to angle
6 --------------->Transitive Property of

5. angle 6
congruent to angle 7 ------------------>Vertical Angles Theorem

6. angle2 congruent to angle
7 ---------->Transitive Property of Congruence

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