Question 40

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waecmaths question: 

The sum of the interior angles of a regular polygon is 1800o. How many sides has the polygon?

Option A: 

16

Option B: 

12

Option C: 

10

Option D: 

8

waecmaths solution: 

$\begin{align}  & \text{Total angles in a regular polygon is given by (}n-2){{180}^{\circ }} \\ & (n-2){{180}^{\circ }}={{1800}^{\circ }} \\ & n-2=10 \\ & n=12 \\\end{align}$

maths year: