Question

The diagram shows a regular pentagon.

a)
Work out the sum of the interior angles.
b)
Work out the size of one interior angle.

Answer 1

a) 540° b) 108°

Explanation:

Formula: (n-2)×180°

a) (5-2)×180°

3×180°=540°

b) 540°÷5=108°

n means nr of sides