Question

Determine the value of each interior angle (in degrees) of a regular decagon.

• A. 144

Answer 1

The correct option is A 144
A decagon has $10$ sides.

Therefore, the sum of the measure of the interior angles will be,
$=(n-2)\times {180}^{\circ }$

$=(10-2)\times {180}^{\circ }$

$=8\times {180}^{\circ }$

​​​​​​​$={1440}^{\circ }$

The measure of each interior angle is equal to $\frac{{1440}^{\circ }}{10}={144}^{\circ }$