Solution
Sum of all interior angles of a polygon with $$'n'$$ sides = $$(n-2)\times180^\circ$$
=> Sum of angles of an octagon = $$(8-2)\times180^\circ$$
= $$6\times180^\circ=1080^\circ$$
$$\therefore$$ Measure of each interior angle of a regular polygon of 8 sides = $$\frac{1080^\circ}{8}=135^\circ$$
=> Ans - (C)
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