What is the sum of the interior angles of an octagon (eight - sided polygon)?

Sum of interior angles of polygon

Find the sum of the interior angles of a polygon of 8 sides.

Find the sum of the interior angles of the an 8-sided polygon.

What is sum of the interior angles of a regular polygon of n sides?

The sum of the interior angles of a regular heptagon (seven-sided polygon) is:

The measure of the sum of the interior angles of a regular n-sided polygon is (n-2) 180^@ . A regular octagon is shown below. What is the measure of the designated angle ?

Prove that the sum of the interior angles of an octagon is twice the sum of interior angles of a pentagon

What is the sum of all interior angles of a polygon of (i) n sides (ii) 7 sides (iii) 8 sides (iv) 10 sides ?