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Question

A parallelogram is drawn in a trapezium, the area of the parallelogram is 80 cm2, find the area of the trapezium.

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Solution

The given figure is:

From above figure,

Length of the parallel sides of the trapezium are 22 cm and 10 cm.

Also, it is given that the area of the parallelogram is 80 cm2 and its base is 10 cm.

We know that Area of parallelogram = Base × Height

80 cm2=10 cm× Height

Height =80 cm210 cm=8 cm

Therefore, height of the trapezium (Distance between the parallel sides) is 8 cm.

Now, Area of trapezium

=12×(Sum of the parallel sides)×(Distance between the parallel sides)

=12×(22 cm+10 cm)×(8 cm)

=32 cm×4 cm

=128 cm2

Therefore, Area of the trapezium is 128 cm2.


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