The measure of the angles in the plaque are;
m∠1 = 113°
m∠2 = 67°
m∠3 = 113°
What the measure of the angles?
m∠1 + 67° = 180°
Supplementary angles (sum of angles on a straight line = 180°)
m∠1 = 180° - 67°
m∠1 = 113°
m∠2 = 67° (vertical opposite angles are equal)
m∠3 = 113° (vertical opposite angles are equal
Hence, the measure of the angles are found by using the complementary angles principle and vertical opposite angles principle.