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4. Find the area of the following triangles.

(a) (b) (c) (d)

8 cm 4 cm 7.5 cm 4 cm

6 cm
8 cm
5 cm 5.4 cm
5. Find the area of a rectangle ABCD, a triangle ADC, and a triangle BAC, if the base = 15 cm and
height = 22 cm.

6. What will be the area of a triangle, if the base of a triangle is 25 cm and the height is 3 cm?

7. Find the area of a parallelogram whose base is 13 cm and height is 9 cm.

8. Find the base of a parallelogram, if its area is 676 sq. mm and the height is 52 cm.
2
9. The height of a parallelogram is five times its base. If the area of the parallelogram is 320 cm , find
the base and height.

10. A parallelogram has sides 22 cm and 18 cm. If the distance between its longer sides is 9 cm, find
the distance between its shorter sides.

11. The base and the height of a triangle are in the ratio 6 : 5 and its area is 153.6 m . Find the base and
2
the height of the triangle.

12. In the given figure, PQRS is a parallelogram in which QR = 15 cm, P Q
QN = 22 cm, and QM = 12 cm. Find the area of the parallelogram
PQRS and length of the side SR. Also, find the a perimeter of the
given parallelogram PQRS. N

S M R

13. DABC is right angled at A. AD is perpendicular to BC. If AB = 5 cm, A
BC = 13 cm and AC = 12 cm, find the area of DABC. Also, find the 12 cm
length of AD. 5 cm

B D C
13 cm

14. In the given figure, DXYZ is an isosceles triangles with XY = XZ = 9 X
cm, and YZ = 12 cm.
The height XM from X to YZ is 6 cm. Find the area of DXYZ. N 9 cm
What will be the height ZN from Z to XY? 9 cm
6 cm
Y M Z
12 cm

15. A field is in the shape of a parallelogram. If its two adjacent sides are 140 m and 90 m respectively,
find the cost of fencing it at `30 per metre.

293 Perimeter and Area