Introduction to Geometry: Parallel and Perpendicular Lines

think icon Think & Click: Vertical Angles

Now, you try. Complete the Think & Click activity by looking at the problem below, thinking about it, and then clicking on the question to reveal the solution.

lines M Q and P N intersect at point L

If angles MLN and PLQ are vertical angles and measure of angle M L N= 6x - 7 degrees
and measure of angle P L Q= 2x + 13, find x.
 

6x – 7 = 2x + 13
4x = 20
x = 5