Question

Find the sum of internal angle of a: Pentagon (5), hexagon (6),heptagon(7),decagon(10) and polygon 15sides​

Answer 1

Answer:

Sum of angle = (X-2) ×180°

Here,X = Number of side

A). Pentagon has 5 sides so, sum of angle

= (5-2) ×180°

= 3×180° = 540°

B). Hexagon has 6 sides so,sum of angle

= (6-2) ×180°

= 4 ×180° = 720°

C) Heptagon has 7 sides so,sum of angle

= (7-2)×180°

= 5 × 180° =900°

D) Decagon has 10 sides so,sum of angle

= (10-2) ×180°

= 8×180° = 1440°