Question

3. Calculate the sum of the angles of a polygon which has
(i) 5 sides
(ii) 7 sides
(iii) 14 sides,
​

Answer 1

Formula is (n - 2)×180 where n is number of sides.

Now

(i) (5 - 2)×180 = 3×180 = 560°

(ii) (7 - 2) ×180 = 5×180 = 900°

(iii) (14 - 2)×180 = 12×180 = 2160°

Hope it helps.