Question

The two triangles illustrated below are similar. What are the values of x and y?

A. x = 15, y = 12
B. x = 2.4, y = 30
C. x = 15, y = 75
D. x = 15, y = 30

(Picture below.)

Answer 1

x=15

Answer 2

right

Answer 3

I don't know how to find out y though. ):

Answer 4

corresponding angles of similar triangles are equal, by definition

Answer 5

so whichever angle corresponds to y is equal to y

Answer 6

Wait, so it's D?

Answer 7

oh, yeah. it is!