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Grade 8 - Mathematics3.35 Semicircle - II

 Example: The radius of a semicircle is 6.3cm. Find its area. Solution: Area of semicircle = 1/2 * pr2 Given that, r = 6.3cm. A = 1/2 * 22/7 * (6.3)2 A = 11/7 * 6.3 * 6.3 A = 436.59/7 A = 62.37 Sq. cm. 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 16.4cm. Find its area.None of these422.46 Sq. cm.422.65 Sq. cm. Q 2: The radius of a semicircle is 5.4 cm. Find its area.None of these45.56 Sq. cm.45.83 Sq. cm. Q 3: The radius of a semicircle is 15.4 cm. Find its area.none of these372.49 Sq. cm.372.68 Sq. cm. Q 4: The radius of a semicircle is 29.7 cm. Find its area.1386.14 Sq. cm.None of these1386.26 Sq. cm. Q 5: The radius of a semicircle is 19.8 cm. Find its area.616.27 Sq. cm.616.07 Sq. cm.None of these Q 6: The radius of a semicircle is 9.6 cm. Find its area.143.43 Sq. cm.None of these143.33 Sq. cm. Q 7: The radius of a semicircle is 6.5 cm. Find its area.None of these66.56 Sq. cm.66.4 Sq. cm. Q 8: The radius of a semicircle is 7.6 cm. Find its area.90.74 Sq. cm.None of these90.77 Sq. cm. Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!