Question

find the measure of an Interior angle of 21 sided polygon

Answer 1

step by step explanation

first of all we will measure the exterior angle of 21 side polygon

Exterior angle= 360/n
=360/21=15

Now,
exterior angle+interior angle=180
15 + interior angle is equal to 180
interior angle=180 - 15
=165

Answer 2

Answer:

i dont know the exact answer....

Step-by-step explanation:

bit i think the ans is 3420.. i dont know whether the ans is right or wrong