Question

I honestly don’t know how to solve this...Would I just be dividing 18 in half? Because it looks like the line is split evenly down the middle.

Answer 1

12

Explanation:

This is one of those “not to scale” pictures. We know that BC is twice as long as AB.

AB=x

BC=2x

AC=18

x+2x=18

3x=18

x=18÷3

x=6

AB=x=6

BC=2x=2(6)=12