The sum of the interior angles of a polygon is 20 right angles. How many sides does the polygon have?

tundex4x4

13 years ago

using d formular 4 sum of interior angle i.e (n-2)180=t

where n =number of sides, t= total sum of interior angle

:- (n-2)180=90*20

180n-360=1800

n=(1800+360)/180

:- ans= 12 i.e A