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If the perimeter of a semi circular protractor is 36 cm,find the diameter of the protractor |
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Answer» πr=3622/7 ×r= 36r= 36×7/22r=18×7/11d=2×18×7/11d=22.9 Perimeter of semi circular is given by = π r+2r36 = πr+2r36 = r( π+2)36 = r(22/7 +2)36 = r(22+14/7)36= r(36/7)1 = r/7r= 7 cm\xa0d = 2r = 2*7 = 14 cm SorRy but Wright answer is 11.45 is it 22.90 |
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