Question

What is the sum of a° + c°?

300°

120°

230°

240°

Answer 1

a + c = 300°

Explanation:

a = 180°

c = 180° - 60° = 120°

a + c = 180° + 120° = 300°

Answer 2

300°

Explanation:

Given from the diagram:

Angle a° = 180° (Single angle on a straight line)

Angle c° + 60° = 180° (Sum of angles on a straight line)

Angle c° = 180° - 60° = 120°

Angle a° + c° = 180° + 120° = 300°