28 सेमी त्रिज्या आणि मध्यवर्ती कोन 45° असलेल्या वर्तुळपाकळीचे क्षेत्रफळ काढा -

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Bihar STET TGT (Maths) Official Paper-I (Held On: 04 Sept, 2023 Shift 2)
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  1. 308 सेमी2
  2. 294 सेमी2
  3. 322 सेमी2
  4. 318 सेमी2

Answer (Detailed Solution Below)

Option 1 : 308 सेमी2
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Bihar STET Paper 1 Mathematics Full Test 1
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वापरलेली संकल्पना:

वर्तुळपाकळीचे क्षेत्रफळ = θ/ 360° × πr2, येथे r ही वर्तुळाची त्रिज्या आहे

स्पष्टीकरण:

वर्तुळपाकळीचे क्षेत्रफळ = θ/ 360° × πr2 = 45°/360° × 22/7 × 28 × 28 = 308सेमी2, येथे r ही वर्तुळाची त्रिज्या आहे.

म्हणून, योग्य उत्तर 308 सेमी2 हे आहे.

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