Question

What is the answer to #3

Answer 1

C

Explanation:

The angles of any triangle add up to 180 degrees.

`8x + (7x+2) + (4x+7) = 180 \\ 19x+9=180 \\ 19x=181 \\ x=9`

Putting this value into the expressions for the angle measures:

`m\angle J=7x+2=65 \\ m\angle K=8x=72\\m\angle L=4x+7=43`