Question

Give the appropriate similarity criteria that can be used the trianglessimilar.a. AAb. SASc. SSSd. Not Similar

Answer 1

Since DEC and DAB share the angle D, and the lines EC and AB are parallel, then we can also see that the angles CED and BAD are congruent. Then, we can prove the similarity between those two triangles thanks to the AA criterion.

Therefore, the answer is:

$AA$