Question

Worksheet 4
13. F
CIR
1. The area of a triangle is 90 cm2. If its base is 15 cm, find its altitude.
2. Find the base of a triangle whose area is 0.48 dm2 and altitude is 8 cm.
3. Find the area of a right triangle whose hypotenuse is 13 cm and one side is 5 cm
4. Find the area of an isosceles right triangle whose equal sides are 15 cm each.
5. Find the area of an isosceles right triangle having the length of each equal side 5
6. The base of a triangular field is three times its height. If the cost of cultivating +
at 36 per hectare is 486, find its base and height (1 hectare = 10000 m2).
7. In the figure 11.14, ST = 5 cm, QR = 9 cm. The area of the larger triangle is 50 cm.
is the area of shaded region?
ual side 5 cm.
Itivating the field
350 cm. What
I
TR
F---> 9 cm ---H
Fig. 11.14​

Answer 1

Answer:

1.As we know,

area of triangle=1/2xbxh

=1/2x12xh=90cmsquare

h=12cm

2.