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Mathematics · 2023 · 5 marks
CBSE 2023 · Region 1 · Set 1 · Q34
A chord of a circle of radius 14 cm subtends an angle of 60° at the centre. Find the area of the corresponding minor segment of the circle. Also find…
A chord of a circle of radius $\displaystyle 14$ cm subtends an angle of $\displaystyle 60$° at the centre. Find the area of the corresponding minor segment of the circle. Also find the area of the major segment of the circle.
Marking-scheme solution
Area of minor segment \(\displaystyle =\frac{22}{7} \times 14 \times 14 \times \frac{60}{360}-\frac{1}{2} \times 14 \times 14 \times \frac{\sqrt{3}}{2}\)
\[=\left(\frac{308}{3}-49 \sqrt{3}\right) \mathrm{cm}^{2} \text { or } 17.9 \mathrm{~cm}^{2}
\]
Area of major segment \(\displaystyle =\frac{22}{7} \times 14 \times 14-\left(\frac{308}{3}-49 \sqrt{3}\right)\)
\[\begin{aligned}
& =616-\frac{308}{3}+49 \sqrt{3} \\
& =\left(\frac{1540}{3}+49 \sqrt{3}\right) \mathrm{cm}^{2} \text { or } 598.1 \mathrm{~cm}^{2}
\end{aligned}
\]
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CBSE Class 10 Mathematics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.