Question

Question #a0abc

Answer 1

Assuming we are working with a regular polygon the equation would be
`360/n`

Explanation:

A regular polygon is defined by all sides and all angles having equal measures.

The sum of the exterior angles of a regular polygon is `360^o`

Using the equation `360^o/n` = exterior angle, where `n=` the number of angles of the polygon.

For the three samples above

Triangle `n=3` `360^o/3 = 120^o`

Square `n=4` `360^o/4 = 90^o`

Pentagon `n=5` `360^o/5 = 72^o`