Question

The number of sides in a regular polygon is 140 degree then of sides is​

Answer 1

Answer:

Math keep one mentally active. we can tackle the problem improvise method 1: the interior angle 140 degree the supplement of this the exterior angle and equal to 40 degree. Hence the number of side is 360/40=9 side

method 2=since since the exterior angle 140 degree, the sum of the interior angle=(2n-4)*right ang

so 140 n=(2n-4)*reight angle,or

140=(2n-4)*90,or

140n=180n-360 or

40n=360 or

n=9side

hence, number of side is 9 side