Question

"Are the two triangles similar? How do you know?"

Answer 1

SAS SSS or AA?

Answer 2

SAS. Even though the middle angle isn't specified, it's hinted because the two triangles are connected together. They're vertical angles.

Answer 3

not looking for congruence, similarity

Answer 4

The sides are in equal proportions\[\frac{ 8 }{ 16 } = \frac{ 9 }{ 18 }\]

You have to spin one of the triangles around to get the right sides

Answer 5

the SAS things are to test congruence, same triangles, not similar

Answer 6

as izuru pointed out, these two angles are congruent because they are vertical angles

Answer 7

Thanks!

Answer 8

congruent?