-Welp- one year ago "Are the two triangles similar? How do you know?"

1. -Welp-

|dw:1438743151384:dw|

2. -Welp-

SAS SSS or AA?

3. anonymous

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

4. DanJS

not looking for congruence, similarity

5. DanJS

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

6. DanJS

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

7. jim_thompson5910

as izuru pointed out, these two angles are congruent because they are vertical angles |dw:1438744084529:dw|

8. -Welp-

Thanks!

9. DanJS

congruent?