In the figure, AOB is a straight line. Name the angles that give a sum of 180 degrees.
∠a, ∠b, ∠c
Find the unknown marked angles in the following figures.
77°
Find the unknown marked angles (∠a, ∠b and ∠c) in the following figures.
∠a = 45°, ∠b = 45°, and ∠c = 135°