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If (s=25\pi) cm and the central angle is (225^\circ), what is the radius?यदि (s=25\pi) सेमी और केंद्र कोण (225^\circ) है तो त्रिज्या क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (20) cm(20) सेमी
(225^\circ=\frac{5\pi}{4}) and (r=\frac{s}{\theta}=\frac{25\pi}{5\pi/4}=20). Convert the angle to radians first.(225^\circ=\frac{5\pi}{4}) और (r=\frac{s}{\theta}=\frac{25\pi}{5\pi/4}=20) है। कोण को पहले रेडियन में बदलें।
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