Question

13) Three adjacent angles are at a point. The first angle is represented by x, the second angle is 20° more than the

first, and the third angle is 20° more than the second angle. Find the measurements of all three angles.

Answer 1

x=40 degrees

Explanation:

adjacent angles add up to 180 degrees

First angle=x

second angles=x+20

third angle =x+40

add all and equate to 180 degrees i.e.

x+x+20+x+40=180

3x=180-60

x=40 degrees

x+20=40+20=60 degrees

x+40=40+40=80 degrees