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The diameter of a semicircle is 4cm. Find the circumference of the semicircle
L=pi* (d/2)+d =10.28cm
The diameter of a semicircle is 5cm, and the circumference of the semicircle is 5cm______ The area is______ ．
3.14 × 5 / 2 + 5 = 12.85 (CM) 5 / 2 = 2.5 (CM) 3.14 × 2.52 / 2 = 9.8125 (square cm) answer: the circumference of this semicircle is 12.85 cm, and the area is 9.8125 square cm. So the answer is: 12.85 cm, 9.8125 square cm
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