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Construct a pair of langurluher at an angle of 60°. Measure the length of tallyelen the given figure. BC is diameter. If AB = 3cm, AC=4cm and A=90Find the area of the shaded region. (<=3.14)3cmin three equ |
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Answer» BC²=AC²+AB² =4²+3² =16+9 =25 BC=5cm Area of biggest semicircle= 1/2 * 3.14 * r² =0.5*3.14*5*5 =0.5*78.5 =39.25 cm² Area of 2nd Largest Semicircle = 0.5*3.14*r² =0.5*3.14*3² =0.5*3.14*9 =14.13 cm² Area of smallest Semicircle = 0.5*3.14*r² =0.5*3.14*4² =0.5*3.14*16 =25.12cm² Area of Triangle = 1/2 *b*h = 0.5*3*4 =6 cm² Area of shaded region = (6+25.12+14.13) - 39.25 = 45.25-39.25 =6 cm² |
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