Find the interior angle of decagon. - Vidyadip

Question

Find the interior angle of decagon.

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Answer

$\begin{aligned} \text { Exterior angle of decagon } & =\frac{360^{\circ}}{\text { Number of sides }} \\ & =\frac{360^{\circ}}{10}=36^{\circ}\end{aligned}$
$\begin{aligned} \therefore \text { Interior angle } & =180^{\circ}-\text { Exterior angle } \\ & =180^{\circ}-36^{\circ}=144^{\circ}\end{aligned}$

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