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9. Perimeter and Area
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Q81 of 131 Page 226

In Fig. 9.35, find the area of parallelogram ABCD if the area of shaded triangle is 9 cm2.

Given, Area of shaded triangle = 9 cm2


× BE × AE = 9


× 3 × AE = 9


AE = 6cm


Area of a parallelogram = b × h (corresponding height) (corresponding height)


Area of parallelogram ABCD = 7 × 6 = 42 cm2


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79

Ratio of the area of ∆WXY to the area of ∆WZY is 3 : 4 (Fig. 9.33). If the area of ∆WXZ is 56 cm2 and WY = 8 cm, find the lengths of XY and YZ.

80

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Questions · 131
9. Perimeter and Area
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