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### Grade 8 - Mathematics3.34 Semicircle - I

 Example: The radius of a semicircle is 6.3 cm. find its perimeter. Solution: The perimeter of a semicircle is = r(2+p). Given that, r = 6.3 cm. P = 6.3 (2 + 22/7) = 6.3 [(14+22)/7] = 6.3 * 36/7 = 2268/7 P = 32.4cm. Directions: Solve the following problems and correct the answer at two decimal place. Also write at least ten examples of your own.
 Q 1: The radius of a semicircle is 21.7 cm. find its perimeter.111.6 cm.113.6 cm.112.6 cm. Q 2: The radius of a semicircle is 9.4 cm. find its perimeter.48 cm.48.3 cm.None of these Q 3: The radius of a semicircle is 16.8 cm. find its perimeter.86.4 cm.86 cm.None of these Q 4: The radius of a semicircle is 18.4 cm. find its perimeter.94.63 cm.None of these94.6 cm. Q 5: The radius of a semicircle is 84 cm. find its perimeter.None of these432.56 cm.432 cm. Q 6: The radius of a semicircle is 7.4 cm. find its perimeter.None of these38.06 cm.38.6 cm. Q 7: The radius of a semicircle is 15.6 cm. find its perimeter.None of these80 cm.80.23 cm. Q 8: The radius of a semicircle is 8.6 cm. find its perimeter.None of these44.23 cm.44.2 cm. Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!