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वृत्त के महत्वपूर्ण सूत्र
वृत्त का क्षेत्रफल = πr²
वृत्त का व्यास = 2r.
वृत्त की परिधि = 2πr.
वृत्त की परिधि = πd
वृत्त की त्रिज्या = √व्रत का क्षेत्रफल/π
वृताकार वलय का क्षेत्रफल = π (R2 – r2)
अर्द्धवृत्त की परिधि = ( π r + 2 r )
अर्द्धवृत्त का क्षेत्रफल = 1/2πr²
Oneday Exams-Medium-Hindi
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