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In the adjoining figure, ABCD is a parallelogram. P and Q are any two points on the sides AB and BC respectively. Prove that :
ar (ΔCPD) = ar (ΔAQD).

In the adjoining figure, ABCD is a parallelogram. P and Q are any two points on the sides AB and BC respectively. Prove that. Quadrilaterals, R.S. Aggarwal Mathematics Solutions ICSE Class 9.

Theorems on Area

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Answer

∆CPD and ||gm ABCD are on the same base CD and between the same parallel lines AB and CD.

Area of ∆CPD = 12\dfrac{1}{2} Area of ||gm ABCD ……(1)

∆AQD and ||gm ABCD are on the same base AD and between the same parallel lines AD and BC.

Area of ∆AQD = 12\dfrac{1}{2} Area of ||gm ABCD ……(2)

From equations (1) and (2), we get :

Area of ∆CPD = Area of ∆AQD.

Hence, proved that area of ∆CPD = area of ∆AQD.

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