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What is the arc length made by an angle of (72^\circ) in a circle of radius (20) cm?त्रिज्या (20) सेमी वाले वृत्त में (72^\circ) कोण से बने चाप की लंबाई क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (8\pi) cm(8\pi) सेमी
(72^\circ=\frac{2\pi}{5}) and (s=20\times \frac{2\pi}{5}=8\pi) cm. Convert degrees to radians before finding the arc.(72^\circ=\frac{2\pi}{5}) और (s=20\times \frac{2\pi}{5}=8\pi) सेमी है। चाप निकालने से पहले डिग्री को रेडियन में बदलें।
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