Q20 of 47 Page 20

Find the area of the field shown in Fig. 20.39 by dividing it into a square, a rectangle and a trapezium.



Area of given figure = area of square ABCD + area of rectangle DEFG + area of rectangle GHIJ + area of triangle FHI


Area of given figure =


Area of given figure =


Area of given figure = = 70 cm2


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18

If the area of a trapezium is 28 cm2 and one of its parallel sides is 6 cm, find the other parallel side if its altitude is 4 cm.

 19

In Fig. 20.38, a parallelogram is drawn in a trapezium, the area of the parallelogram is 80 cm2, find the area of the trapezium.

 1

Find the area of the pentagon shown in fig. 20.48, if AD = 10 cm, AG = 8 cm, AH = 6 cm, AF = 5 cm, BF = 5 cm, CG = 7 cm and EH = 3 cm.

 2

Find the area enclosed by each of the following figures [fig. 20.49 (i)-(ii)] as the sum of the areas of a rectangle and a trapezium.