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Geometry worksheet to help students complete and write similar triangle proofs involving parallel lines and alternate interior angles.

Activity 3.8​

Assignment 3.9

​Assignment 6.16

​Parallel Lines and Similar Triangles Proofs

 
Objective
Complete and write proofs that use parallel line theorems to prove that triangles are similar.
 
 
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Geometry worksheet to help students complete and write similar triangle proofs involving parallel lines and corresponding angles.

About Geometry Worksheet Assignment 6.16:     

 

Assignment 6.16 is an introduction to proofs for similar triangles with a pair of parallel sides..

 

Prerequisite Skills:  Identify and name pairs of congruent alternate interior angles and corresponding angles determined by parallel lines (Assignment 4.10).  Write proofs for similar triangles (Assignment 6.15). 

 

Theorems:  If two parallel lines are intersected by a transversal, then the alternate interior angles are congruent.

                          If two parallel lines are intersected by a transversal, then the corresponding angles are congruent.

 

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