NCERT MCQ CLASS-9 CHAPTER-12 | HERON’S FORMULA | EDUGROWN

NCERT MCQ ON HERON’S FORMULA

Question 1.

The sides of a triangles are 3cm, 4cm, 5cm. The area is

a) 15 cm²

b) 12 cm²

c) 9 cm²

d) 6 cm²

Answer: d)

Question 2.

The area of ΔABC is:

a) 20 cm²

b) 10 cm²

c) 4√5 cm²

d) 2√5 cm²

Answer: d)

Question 3.

The area of a triangular sign board of sides 5 cm, 12 cm and 13 cm is:

a) 60 cm²

b) 30 cm²

c) 12 cm²

d) 65/2 cm²

Answer: b)

Question 4.

The sides of a triangle are in a ratio of 25:14:12 and its perimeter is 510 m. The greatest side of the triangle is:

a) 270 m

b) 250 m

c) 170 m

d) 120 m

Answer: b)

Question 5.

The perimeter of a right triangle is 60 cm and its hypotenuse is 26 cm. The other two sides of the triangle are:

a) 26 cm, 8 cm

b) 25 cm, 9 cm

c) 24 cm, 10 cm

d) 20 cm, 14 cm

Answer: c)

Question 6.

The area of the quadrilateral ABCD in the adjoining figure is:

a) 14.8 cm²

b) 15 cm²

c) 15.2 cm²

d) 16.4 cm²

Answer: c)

Question 7.

The area of trapezium in the adjoining figure is:

a) 286 m²

b) 296 m²

c) 306 m²

d) 316 m²

Answer: c)

Question 8.

The area of the quadrilateral ABCD in the adjoining figure is:

a) 57 cm²

b) 95 cm²

c) 102 cm²

d) 114 cm²

Answer: d)

Question 9.

When the sum of squares of two sides of a triangle is equal to the square of the length of the third side, then it is called a:

a) Scalene triangle

b) Right triangle

c) Isosceles triangle

d) Equilateral triangle

Answer: b)

Question 10.

The perimeter of an equilateral triangle is 60 m. The area is:

a) 10√3 m²

b) 15√3 m²

c) 20√3 m²

d) 100√3 m²

Answer: d)

Question 11.

The area of an equilateral triangle with side 2√3 cm is:

a) 5.196 cm²

b) 3.496 cm²

c) 1.732 cm²

d) 0.866 cm²

Answer: a)

Question 12.

The length of each side of an equilateral triangle having an area of 9√3cm² is:

a) 4 cm

b) 6 cm

c) 8 cm

d) 36 cm

Answer: b)

Question13.

The sides of a triangle are 35 cm, 54 cm and 61 cm, respectively. The length of its longest altitude is:

a) 10√5 cm

b) 16√5 cm

c) 24√5 cm

d) 28 cm

Answer: c)

Question14.

The area of an isosceles triangle having base 2 cm and the length of one of the equal sides 4 cm, is

Answer: c)

Question 15.

The edges of a triangular board are 6 cm, 8 cm and 10 cm. The cost of painting it at the rate of 9 paise per cm² is:

a) Rs. 2.00

b) Rs. 2.16

c) Rs. 2.48

d) Rs. 3.00

Answer: b)