Question

A side of the triangle below has been extended to form an exterior angle of 127°. Find

the value of x.
17°
xº
127°

Answer 1

x = 53°

Explanation:

x + 127° = 180° (sum of angles on a straight line/supplementary angles)

Subtract 127 on both sides

x + 127 - 127 = 180 - 127 (subtraction property of equality)

x = 53°