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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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