Show how you would set up and equation to solve for x. Then use your answer for x to find the measure of each angle! Rest is in pic

I hope this helps. If you have any questions as to why they equal each other or why we used 180 just ask

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct