Question

a120⁰btoC115⁰d4If lines a and b are parallel, what is the value of x ?115deg60 deg65 deg120 deg

Answer 1

Given:

lines a and b are parallel.

So, the alternative angles are congruent

So, the measure of the angle that is supplementary with x = 120

the supplementary angles have a sum of 180

so, we can write the following equation:

$\begin{gathered} x+120=180 \\ x=180-120 \\ x=60 \end{gathered}$

So, the answer will be: 60 deg