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11 April, 23:55

This shape is made using three semicircles The smaller semicircle have diameters of 10cm Calculate the shaded area Take 3.142 and write down all the digits given be the calculator

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  1. 12 April, 00:23
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    The shaded area is 314.2 cm²

    Step-by-step explanation:

    Here we have the diameter, d₁ of the smaller semicircles as 10 cm

    We note that the larger semicircle is subtended (bounded) by the two smaller semicircles;

    1 shaded small semicircle and the other is blank

    Therefore, the diameter, d₂ of the large semicircle = 10 + 10 = 20 cm

    Also the area of the shaded figure consists of the removal of one small semicircle and the addition of the other semicircle to the area of the larger semicircle such that the area of the shaded figure is as follows

    Shaded area of figure = π·d₂²/4 + π·d₁²/4 - π·d₁²/4 = π·d₂²/4 = π*20²/4 = 100*3.142 = 314.2 cm²

    Shaded area = 314.2 cm².
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