Question

A polygon has 5 internal angles per angle is 172°and other internal angles whose per angled are 160°.Find the side of polygon

Answer 1

Answer:

21

Step-by-step explanation:

Assume polygon have n sides .So sum of it angles will be (n-2)×180°

Now according to question

160(n-5)+172×5=(n-2)×180

or

160n-800+860=180n-360

or

20n=420

or

n=21