....(n-2) x 180 degree.. Where n = the number of sides om the polygon.. what is the interior angle sum of the eight -sided shape ?

Question

The sum of the interior angles of a polygon can be found using : ....(n-2) x 180 degree.. Where n = the number of sides om the polygon.. what is the interior angle sum of the eight -sided shape ?

Answer 1

You just gave us the formula and the fact that n=8 (octagon).

 

Your task is now to calculate (8-2)(180 degrees).  Yoiu take it from here!