Question

An exterior angle of a regular polygon is 72. the sum of all the interior angles is

Answer 1

360 ÷ 72 = 5
[n-2 ]×180
[5-2]×180
=540

Answer 2

Heya!!

Answer to your question :

Dividing 360 by 72
we get 5

Using it in formula
(n-2) × 180
(5-2) ×180
3×180
540

540 is the sum of all interior angles.


Hope it helps *_*