1. Triangle problem

What is the value of x?
A) 4.0
B) 5.3
C) 9.0
D) 10.2

How do I find the answer?

2. Since they are similar, use a proportion:

$\frac{6}{5}=\frac{x}{8.5}$

solve for x.

3. Originally Posted by galactus
Since they are similar, use a proportion:

$\frac{6}{5}=\frac{x}{8.5}$

solve for x.
I thought I was supposed to use a proportion, but I got confused on which sides corresponded with which. You're a godsend!