Question

Find the value of x that will allow you to prove that CD below is parallel to EF if the measure of 21 is

(3x + 30)° and the measure of 22 is 81°(The figure may not be drawn to scale.)

Answer 1

23

Explanation:

According to the diagram, two sum of <1 and <2 is 180 degrees

Hence 3x+30+81 = 180

3x+111 = 180

3x =180-111

3x = 69

x = 69/3

x = 23