Jambmaths question:
The sum of the interior angles of a polygon is 20 right angles. How many sides does the polygon have?
Option A:
12
Option B:
20
Option C:
40
Option D:
10
Jamb Maths Solution:
$\begin{align} & \text{Sum of interior angles in a regular polygon is given as2}0\text{ right angles}=20\times {{90}^{\circ }}={{1800}^{\circ }} \\ & (n-2){{180}^{\circ }}={{1800}^{\circ }} \\ & n-2=10 \\ & n=12 \\\end{align}$
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