Question

Are the two triangles similar? If so, how do you know *

Not Similar
Similar by AA~
Similar by SAS~
Similar by SSS~

Answer 1

Similar by AA/SAS

Explanation:

20.8/8 = 23.4/9 = 2.6

So, the bottom of the smaller triangle is parallel the bottom of the larger one (Thales' theorem)

So, corresponding angles are equal and hence, they are similar by AA similarity.

Note: As sides are given, similarity can also be proven by SAS.