Question

Find the sum of interior angles of a polygon of given number of sides by using
formula (n - 2) × 180°.
9 sides
22 sides
12 sides​

Answer 1

Answer:

(i) 9 sides = (9-2) × 180° = 7 × 180° = 1260°

(ii) 22 sides = (22-2) × 180° = 20 × 180° = 3600°

(iii) 12 sides = (12-2) × 180° = 10 × 180° = 1800°