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)
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