# How many angles does icosikaihenagon have?

This is a 21 sided polygon and therefore has 21 angles. NOTE : The name supplied for this polygon is an artificial name and never used in practice. General usage refers to thi…s shape as a 21-gon.

# What is the sum of the interior of an icosikaihenagon?

The sum is 3420 as the equation for every regular polygon is (n-2)*180 when n is number of sides