Question

MERCISE 12.4
The base and height of a triangular plot are 42 m and 18 m respectively. Find the area of the plot.
Also find its cost at the rate of 1200 per square metre
Find the altitude (or height) of a triangular disewhose base is 28 cm and the area is 224 sqcm.
The area of a right-angled triangular region is 66 23 sq cm. If one of the sides containing the right
angle is 7.4 cm, find the length of the other side.
The sides or legs of a right-angled triangle containing the right angle are in the ratio 3:4. If its area
is 1014 sq cm, find the length of its hypotenuse.
POR is an isosceles triangle in which the base QR is 16 cm long and each equal side PQ and PR is
10 cm long. Find the area of the triangle PQR.
Find the area of an isosceles right-angled triangle, if one of the equal side is 20 cm long.
Find the area of a quadrilateral ABCD in 8. In the Fig. 12.30, ABCD is a rectangle
which the diagonal BD is 60 cm long and of length 60 m and breadth 25 m.
AP=20 cm, CQ-25 cm are perpendiculars PQ = 6 m is perpendicular to BC and
to BD
MN - 10 m is perpendicular to AD
Find the area of the shaded region.
A
C
D
N
D
B.
P
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Answer 1

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