How to prove similar triangles<br>Define the angle-angle (aa) theorem. Two triangles can be proved similar by the angle-angle theorem which states: if two triangles have two congruent angles, then those triangles are similar. [substeps] This theorem is also called the angle-angle-angle (aaa) theorem because if two angles of the triangle are congruent, the third angle must also be congruent.
Does this next sentence follow, given the preceding text?
There are ways to tell if triangles are similar

Select from the following.
 -- Yes
 -- It's impossible to say
 -- No
Yes