Question

What measure of CAB will prove line AB isparallel to line CD?(5x - 42)BсD(2x + 12)18°30°48°72°

Answer 1

Both angles are congruent

(5x - 42) = (2x + 12)

5x - 2x = 42 + 21

3x = 63

x = 63/3 = 21

x = 21

We will substitute the value of "x" to obtain the angle. We have:

(5x - 42) ⇒ (5 * 21) - 42 ⇒ 105 - 42 = 63