# How many right angles are in an octagon?

Dec 24, 2015

Typically, $0$

#### Explanation:

A regular octagon has $0$ right angles—all its vertices are 135˚.

The angle measurement can be found through the formula (180˚(n-2))/n, where $n$ is the number of sides in a regular $n$-gon.

This isn't to say octagons can't have right angles.

The following picture is of an irregular octagon with $2$ right angles.