Question

find the sum of interior angles of a polygon having 14 sides

Answer 1

sum of int. angles of polygon
=(2n-4)×90°
=(2×14-4)×90°
=(28-4)×90°
=24×90
= 2160°
Hope it helps u.

Answer 2

sum of interior and of polygon=180[n-2]
=180[14-2]
=180[12]
=2160