What is the measure of an interior angle of a regular decagon?
Sum of all interior angles of a polygon having $$n$$ sides = $$(n - 2) \times 180$$°
Number of sides of decagon, $$n = 10$$
=> Sum of interior angles = $$(10 - 2) \times 180$$°
= $$8 \times 180 = 1440$$°
In a regular decagon, all sides are equal and thus all angles are equal.
$$\therefore$$ Measure of each angle = $$\frac{1440}{10} = 144$$°
=> Ans - (C)
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