Class 9 Maths Chapter 12 Heron'S Formula Quiz 4 (12 MCQs)

Quiz Instructions

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1. If the sides of a triangle are 3, 9, and 10, what is the semi-perimeter?

Correct Answer: A) 11.

2. The sides of a triangular plot are in the ratio of 12:17:25 and its perimeter is 540 cm. Find its area.

Correct Answer: C) 9000 cm sq.

3. If the sides of a triangle are 3, 9, and 10, what is the area?

Correct Answer: A) 13.3.

4. For which type of triangle we can use Heron's formula in order to calculate the area?

Correct Answer: D) All of these.

5. The area of an isosceles triangle having a base of 2 cm and a length of one of equal sides 4 cm is ..... sq. cm

Correct Answer: A) $\sqrt{15}$.

6. Find the area of a triangle whose sides are 9m, 12m and 15m

Correct Answer: D) 54 m$^{2}$.

7. If length of two equal sides of an ISOSCELES triangle is 5m each and its Semi perimeter is 9 m, the length of third side will be

Correct Answer: D) 8 m.

8. The perimeter of an equilateral triangle is 60 cm. Find the length of its sides.

Correct Answer: B) 20 cm.

9. The sides of a triangle are 16, 30, 34cm its area is

Correct Answer: D) 240cm$^{2}$.

10. Area of triangle =?

Correct Answer: B) 1/2.b.h.

11. Find the perimeter of an isosceles right-angled triangle having an area of 5000 m$^{2 }$. (Use square root 2= 1.41)

Correct Answer: C) 341cm2.

12. The perimeter of a triangle is 36cm and its sides are in the ratio 3:4:5. Then the sides are .....

Correct Answer: B) 9 cm, 12 cm, 15 cm.