Examine the table. (Each figure is divided into triangles and the sum of the angles deduced from that.) What can you say about the angle sum of a convex polygon with number of sides?

(a) When = 7, then n
Angle sum of a polygon = (n-2) x 180° = (7-2) x 180°=5×180° = 900°
(b) When n = 8, then
Angle sum of a polygon = (n-2) x 180°=(8-2) x 180° = 6 x 180°=1080°
(b) When n = 8, then
Angle sum of a polygon = (n-2) x 180°=(10-2) x 180° = 8 x 180°=1440°
(d) When n = n, then, angle sum of a polygon = (n-2) x 180°

Class 8 Maths Chapter 3 Exercise 3.1 Solution in Video

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