Q176 / 270 · NDA 2021 (Phase 1) · Mathematics

What is the interior angle of a regular octagon of side length 2 cm ?

  • A
    $\frac{\pi}{2}$
  • Correct answer
    B
    $\frac{3 \pi}{4}$
  • C
    $\frac{3 \pi}{5}$
  • D
    $\frac{3 \pi}{8}$

Solution

Number of sides, $n=8$ Interior angle of $n$-sides polygon $=\frac{(n-2) \times \pi}{n}=\frac{(8-2) \times \pi}{8}=\frac{3 \pi}{4}$.

Hence, the correct answer is option: 'B'.

Relevant Questions