find the ratio between the two triangles:
40 on the left corresponds to 50 on the right = 40/50 = .8
.8 is the fixed ratio between these two triangles.
to find x:
43 x .8 = 34.4
x = 34.4
"angles of similar triangles are always congruent."
a: 63
b: 88
c: 29
