Question

The number of sides of a regular polygon is 20,

a) Find each external angles of the polygon?
b) Find each internal angles of the above polygon ?​

Answer 1

Explanation:

a) external angles is also known as exterior angles

exterior angle = 360

we have n=20

360/n=360/20=18

the external angles of a regular polygon of 20 is 18 degree

b) internal angles is also known as interior angles

interior angle = 180

exterior angle = 18

interior angle - exterior angle

180-18=162 degree

the internal angles of 20 is 162 degree

Answer 2

Sum of all the exterior angles in any polygon is always 360º

Find the number of sides:

One exterior angles = 20º

Number of sides = 360 ÷ 20

Number of sides = 18

Explanation: