Question

3. What is the sum of an interior angle of a polygon having
(a) 5 sides
(b) 9 sides
(d) 8 sides
(C) 10 sides​

Answer 1

Answer:

A pentagon has five sides, thus the interior angles add up to 540°

A Nonagon has 9 sides ,so the interior angles add up to 1260°

A octagon has 8 sides ,so the interior angles add up to 1080°

A Decagon has 10 sides ,so the interior angles add up to 1440°

Answer 2

here is the explanation...

sum of interior angle= ( 2n-4)×90°