1. Lesson 7-3
Similar Triangles

3. Example: Determine if the triangles are similar
Yes….because the similarity statement
is ∆ JKL∼∆ QPM, so  ∠L≌∠M and if we        
find the missing angles, we discover that  
∠J and∠Q both equal 48 degrees.                                
No…..because the similarity statement
is ∆ABC∼∆GFD.  ∠C and ∠D are congruent,
but ∠B≆∠F, so does not follow the
AA similarity postulate.

4. Determine whether the triangles are similar
Determine whether the triangles are similar. If so, write a similarity statement. Explain your reasoning.

5. Example: Find AE and DE.
Since AB is parallel to CD,