Question

The sum of all exterior angles of a triangle is

• A. ${360}^o$
• B. ${180}^o$
• C. ${540}^o$
• D. none of these

Answer 1

The correct option is A ${360}^o$

An exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side.

An exterior angle of a triangle is equal to the sum of the opposite interior angles. If the equivalent angle is taken at each vertex, the exterior angles always add to $360$ degrees.