Question 21

loading...

Prev/Next links

waecmaths question: 

Each interior angle of a regular polygon is 162o. How many sides has the polygon?

Option A: 

8

Option B: 

12

Option C: 

16

Option D: 

20

waecmaths solution: 

The sum of the an interior angle and its exterior angle is 180o {sum of angles on a straight line}

Exterior angle of the polygon =180o -162o = 18o

 The sum of all the exterior angles is 360o

Therefore, 18on =360o

n =20. (It has 20 sides)

maths year: