Congruence and Similarity - SAT

This video is for the redesigned SAT which is for you if you are taking the SAT in March 2016 and beyond.

How to find missing angle using triangle properties?

Congruence and similarity — Harder example

In the figure above triangle ABC is isosceles, that is, side AB is equal in length to side BC. Triangle DEF overlaps triangle ABC. What is the value of p?

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