Question

I need help. Check answer and explanation.

Answer 1

I am pretty sure that the answer is 12, but I don't really know how to explain why.

Answer 2

@ganeshie8

Answer 3

use mid-segment theorem

Answer 4

How do I use that theorem?

Answer 5

\(\large \frac{8}{x} = \frac{12}{18}\)

Answer 6

144=12x
144/12=12 12x/12=x
x=12

Answer 7

Thanks @ganeshie8. I knew that the answer was twelve. I just didn't know how to explain why.