Question

A pair of parallel lines is cut by a transversal:

What is the measure of angle x?

60
70
80
100

Answer 1

The answer would be 60. Because a line = 180 degrees, right? Well since the angle towards the bottom is 80 degrees, the other side of the line would be 100 in order to reach 180 degrees. So the 'x' would be congruent to the 80 degree angle. Since you already have the 20 degrees. Subtract.
80-20= 60