Exams › SSC CGL (Prelims) › General

Calculate the sum of all interior angles of a regular octagon.

1. 1080°
2. 900°
3. 1260°
4. 720°

Correct answer: 1080°

Solution

The sum of interior angles of an $n$-sided polygon is $(n-2)\times180^\circ$. For an octagon, $n=8$, so the sum is $(8-2)\times180^\circ=1080^\circ$.

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