This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Mathematics > Heron'S Formula > Class 9 Maths Chapter 12 Heron'S Formula – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Maths Chapter 12 Heron'S Formula Quiz 2 (23 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If the perimeter of a rhombus is 20 cm & one of its diagonals is 8 cm. The area of the rhombus is A) 30 sq cm. B) 24 sq cm. C) 48 sq cm. D) 50 sq cm. Show Answer Correct Answer: B) 24 sq cm. 2. The perimeter of a triangle is 36 cm & its sides are in the ratio 3:4:5. Then the sides are A) 6 cm, 9 cm, 12 cm. B) 9 cm, 12 cm, 15 cm. C) 12 cm, 15 cm, 18 cm. D) None of these. Show Answer Correct Answer: B) 9 cm, 12 cm, 15 cm. 3. The base and corresponding altitude of a parallelogram is 10 cm and 3.5 cm respectively. The area of the parallelogram = ..... A) 350 cm$^{2}$. B) 17.5 cm$^{2}$. C) 30 cm$^{2}$. D) 35 cm$^{2}$. Show Answer Correct Answer: D) 35 cm$^{2}$. 4. A rhombus shaped sheet with perimeter with 40cm and diagonal 12cm.Find the area of rhombus. A) 400 sq cm. B) 48 sq cm. C) 16 sq cm. D) 40 sq cm. Show Answer Correct Answer: B) 48 sq cm. 5. 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) 60 cm. D) 45 cm. Show Answer Correct Answer: C) 60 cm. 6. An isosceles right triangle has area 8 cm$^{2}$. The length of its hypotenuse is A) $\sqrt[]{48}$. B) $\sqrt[]{24}$. C) $\sqrt[]{16}$. D) $\sqrt[]{32}$. Show Answer Correct Answer: D) $\sqrt[]{32}$. 7. Find the area of a triangle in which the base is 34 cm and the height is 9 cm A) 513 cm. B) 153 cm$^{2}$. C) 306 cm$^{2}$. D) 612 cm$^{2}$. Show Answer Correct Answer: B) 153 cm$^{2}$. 8. The area of a triangle is 120 $m^2$ A) 12 m. B) 6 m. C) 60 m. D) 2400 m. Show Answer Correct Answer: A) 12 m. 9. What is the area of an equilateral triangle with side $\frac{\sqrt{3}}{4}?$ A) $\frac{3}{16}cm^2$. B) $\frac{3}{14}cm^2$. C) $\frac{2}{15}cm^2$. D) $\frac{2}{27}cm^2$. Show Answer Correct Answer: A) $\frac{3}{16}cm^2$. 10. The length of equal sides of an isosceles right triangle is $\sqrt{2}$ A) 4 cm. B) 8 cm. C) 2 cm. D) None of these. Show Answer Correct Answer: C) 2 cm. 11. The base of a right triangle is 8 cm and hypotenuse is 10 cm. Its area will be A) 80 cm$^{2}$. B) 40 cm$^{2}$. C) 24 cm$^{2}$. D) 48 cm$^{2}$. Show Answer Correct Answer: C) 24 cm$^{2}$. 12. Which of the following is Heron's Formula for finding area of triangle A) $A=\sqrt{s\left(s+a\right)\left(s+b\right)\left(s+c\right)}$. B) $A=\sqrt{\left(s+a\right)\left(s+b\right)\left(s+c\right)}$. C) $A=\sqrt{s\left(s-a\right)\left(s-b\right)\left(s-c\right)}$. D) $A=\sqrt{s\left(s\times a\right)\left(s\times b\right)\left(s\times c\right)}$. Show Answer Correct Answer: C) $A=\sqrt{s\left(s-a\right)\left(s-b\right)\left(s-c\right)}$. 13. If the sides of a triangle are 3, 9, and 10, what is the semi-perimeter? A) 22. B) 19. C) 13. D) 11. Show Answer Correct Answer: D) 11. 14. The sides of a triangular plot are in the ratio of 12:17:25 and its perimeter is 540 cm. Find its area. A) $1500\sqrt{3}$. B) 150 cm sq. C) 9000 cm sq. D) None of the above. Show Answer Correct Answer: C) 9000 cm sq. 15. If the sides of a triangle are 3, 9, and 10, what is the area? A) 13.3. B) 15.75. C) 124.62. D) None of the above. Show Answer Correct Answer: A) 13.3. 16. For which type of triangle we can use Heron's formula in order to calculate the area? A) Scalene. B) Iscosceles. C) Equilateral. D) All of these. Show Answer Correct Answer: D) All of these. 17. 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 A) $2\sqrt{15}$. B) $\frac{\sqrt{15}}{2}$. C) $4\sqrt{15}$. D) $\sqrt{15}$. Show Answer Correct Answer: D) $\sqrt{15}$. 18. Find the area of a triangle whose sides are 9m, 12m and 15m A) 84 m$^{2}$. B) 54 m$^{2}$. C) 64 m$^{2}$. D) 48 m$^{2}$. Show Answer Correct Answer: B) 54 m$^{2}$. 19. 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 A) 6 m. B) 5 m. C) 8 m. D) 7 m. Show Answer Correct Answer: C) 8 m. 20. The perimeter of an equilateral triangle is 60 cm. Find the length of its sides. A) 30 cm. B) 20 cm. C) 10 cm. D) 15 cm. Show Answer Correct Answer: B) 20 cm. 21. The sides of a triangle are 16, 30, 34cm its area is A) 240cm$^{2}$. B) 245cm$^{2}$. C) 260cm$^{2}$. D) 250cm$^{2}$. Show Answer Correct Answer: A) 240cm$^{2}$. 22. Area of triangle =? A) 1/2.h.b.b. B) 1/2.b.h. C) 2b.h. D) B. h. Show Answer Correct Answer: B) 1/2.b.h. 23. Find the perimeter of an isosceles right-angled triangle having an area of 5000 m$^{2 }$. (Use square root 2= 1.41) A) 134cm2. B) 431cm2. C) 341cm2. D) None of the above. Show Answer Correct Answer: C) 341cm2. ← PreviousRelated QuizzesMathematics QuizzesClass 9 QuizzesClass 9 Maths Chapter 12 Heron'S Formula Quiz 1 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books