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The perimeter of a semi-circle is 25.7 cm. What is its diameter (in cm) ? (π = 3.14) |
10 9 12 8 |
10 |
We know that, Perimeter of a semi circle = πr + 2r We have, The perimeter of a semi-circle is 25.7 cm According to the question, πr + 2r = 25.7 r(π + 2) = 25.7 = r = \(\frac{25.7}{5.14 }\) = r = 5 So, the diameter = 10 cm |
