# What is a 20 sided shape called?

In geometry, a polygon is a closed two-dimensional figure with three or more straight lines.

## Answer: A 20 sided polygon is called Icosagon.

The Greek word ‘Polygon’ consists of Poly meaning ‘many’ and gon meaning ‘angle.’

**Explanation:**

A 20 sided shape (polygon) is called Icosagon.

**I**nterior angle of any regular polygon =180[(n−2)/n]

**I**nterior angle of any regular Icosagon = 180(20 - 2)/20 = 162°

The sum of all the interior angles of a regular Icosagon is 3240°.