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CBSE Grade IX - Heron's Formula
Question
1
1.
In an isosceles triangle △ABC, if base BC = 10 cm and area is 70.71 sq.cm, then side AB =
18.00 cm
15.00 cm
20.00 cm
12.00 cm
10.00 cm
Question
2
2.
In an isosceles triangle △ABC, if BC = 16 cm, AB = CA = 18 cm, then corresponding height of side CA =
9.33 cm
14.33 cm
11.33 cm
19.33 cm
17.33 cm
Question
3
3.
A traffic sign board is in the shape of an equilateral triangle . If its perimeter is 51 cm, what is its area ?
107.14 sq.cm
150.14 sq.cm
108.14 sq.cm
125.14 sq.cm
133.14 sq.cm
Question
4
4.
In an isosceles triangle △ABC, the corresponding height of the side BC is 11.78 cm and area is 64.79 sq.cm, then corresponding height of side AB =
11.97 cm
8.97 cm
7.97 cm
10.97 cm
9.97 cm
Question
5
5.
In an isosceles triangle △ABC, the corresponding height of the side BC is 13.56 cm and area is 115.22 sq.cm, then side CA =
13.00 cm
19.00 cm
11.00 cm
16.00 cm
21.00 cm
Question
6
6.
In △PQR, if QR = 19 cm, RP = 16 cm, PQ = 13 cm, then corresponding height of side QR =
13.82 cm
10.82 cm
7.82 cm
5.82 cm
15.82 cm
Question
7
7.
In an isosceles triangle △ABC, if base BC = 18 cm and the corresponding height is 9.38 cm, then corresponding height of side AB =
7.99 cm
12.99 cm
17.99 cm
9.99 cm
15.99 cm
Question
8
8.
In △PQR, if QR = 13 cm, RP = 12 cm and the corresponding height of side QR = 10.65 cm, then area of the triangle =
72.20 sq.cm
66.20 sq.cm
69.20 sq.cm
74.20 sq.cm
64.20 sq.cm
Question
9
9.
In an isosceles triangle △ABC, if BC = 19 cm, CA = AB and perimeter is 43 cm, then corresponding height of side CA =
8.61 cm
14.61 cm
11.61 cm
6.61 cm
16.61 cm
Question
10
10.
In an isosceles triangle △ABC, the corresponding height of the side BC is 16.79 cm and area is 109.11 sq.cm, then side BC =
13.00 cm
8.00 cm
18.00 cm
16.00 cm
10.00 cm
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