Class IX Math
MCQ for Heron’s Formula
1. The area of a triangle is 150 cm2 and its sides are in the ratio 3 : 4 : 5. What is its perimeter?
a. 10 cm
b. 30 cm
c. 45 cm
d. 60 cm
2. What in the area of an equilateral triangle with side 2 cm?
a. √6cm2
b. √3cm2
c. √8cm2
d. 4cm2
3. What is the length of each side of an equilateral triangle having an area of
![](/cbse-ncert/class-9/9-Maths-Heron-Formula-Mcq-UntitoE0.JPG)
a. 4cm
b. 5cm
c. 5cm
d. 6cm
4. The sides of a triangle are 3 cm, 5 cm and 6 cm. What is its area?
a. 2√3cm2
b. 4√14cm2
c. 5√12cm2
d. 2√5cm2
5. What is the area of an equilateral triangle with side
![](/cbse-ncert/class-9/9-Maths-Heron-Formula-Mcq-UntitoE1.JPG)
a. 2/27 cm2
b. 2/15 cm2
c. 3/16 cm2
d. 3/14 cm2
6. length of one of the equal sides of an isosceles triangle is 4 cm. If its be is 2 cm then what is its area?
a. √15cm2
b. √13cm2
c. √12cm2
d. √14cm2
7. If the perimeter of an equilateral triangle is 60 cm, then what is its area?
a. 200√2cm2
b. 100√2cm2
c. 100√3cm2
d. 200√3cm2
8. The sides of a triangle are 8 cm, 11 cm and 13 cm. What is its area?
a. 8√30cm2
b. 4√10cm2
c. 3√100cm2
d. 6√200cm2
9. The sides of a triangle are 15 cm, 17 cm and 8 cm. What is its area?
a. 20cm2
b. 40cm2
c. 60cm2
d. 80cm2
10. The sides of a triangle are in the ratio of 3 : 4 : 5. If its perimeter is 36 cm, then what is its area?
a. 32 cm2
b. 54 cm2
c. 67 cm2
d. 72cm2
Answers
1. D
2. B
3. A
4. B
5. C
6. A
7. C
8. A
9. C
10. B