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IPMAT Indore 2025 · Question 31 of 90 · Quantitative Ability (MCQ)

IPMAT Indore 2025 — Question 31

Area of a regular octagon inscribed in a circle of radius 1 unit is

A $22$
B $\frac{9}{2 2}$
C $10$
D $2 + 2$

Reveal answer

Correct answer

A.

22

Reveal solution

Area of regular n-gon inscribed in unit circle = $\frac{n}{2} sin (2 π / n)$ . For $n = 8$ : $4 sin 45° = 4 \cdot \frac{2}{2} = 22$ .

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