Question

Why $120°$ degree is the highest exterior angle for a regular polygon?

Answer 1

$120°$ is the highest exterior angle for a regular polygon.

• The sum of the measures of exterior angles in a regular polygon is ${360}^o$.
• The minimum number of sides in a regular polygon is $3$.
• Hence the value of exterior angle is $\frac{360}{3}={120}^o$

Hence, the highest exterior angle for a regular polygon is $120°$ degrees.