This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Maths Chapter 12 Heron'S Formula – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Maths Chapter 12 Heron'S Formula Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If each side of an equilateral triangle is 6 cm, the semi perimeter will be A) 8 cm. B) 9 cm. C) 10 cm. D) 11 cm. Show Answer Correct Answer: B) 9 cm. 2. The sides of a triangle are 8 cm, 11 cm and 13 cm. What is its area? A) $8\sqrt{30}cm^2$. B) $4\sqrt{10}cm^2$. C) $3\sqrt{100}cm^2$. D) $6\sqrt{200}cm^2$. Show Answer Correct Answer: A) $8\sqrt{30}cm^2$. 3. What in the area of an equilateral triangle with side 2 cm? A) $\sqrt{6}$. B) $\sqrt{8}$. C) $\sqrt{3}$. D) 4. Show Answer Correct Answer: C) $\sqrt{3}$. 4. "s" in the heron's formula =? A) Symmetry. B) Perimeter. C) Semi-perimeter. D) Square root. Show Answer Correct Answer: C) Semi-perimeter. 5. What does 's' stands for in the Heron's formula? A) Semi-circle. B) Semi-perimeter. C) Semi-axis. D) Semi-lure. Show Answer Correct Answer: B) Semi-perimeter. 6. What is the semi-perimeter? A) 1/2 of the actual perimeter. B) A circular object rotated 90 degrees on its axis. C) Sum of the sides. D) The distance around a semi truck multiplied by the square root of the perimeter. Show Answer Correct Answer: A) 1/2 of the actual perimeter. 7. Heron was born in ..... in ..... A) Barunn Am Inn (Austria), 1889. B) Alexandria(Egypt), 10 AD. C) Frankfurt(Germany), 1929. D) Munich (Germany), 1900. Show Answer Correct Answer: B) Alexandria(Egypt), 10 AD. 8. An isosceles right triangle has an area of 8 sq. cm. The length of its hypotenuse is ..... cm A) $\sqrt{32}$. B) $\sqrt{16}$. C) $\sqrt{48}$. D) $\sqrt{24}$. Show Answer Correct Answer: A) $\sqrt{32}$. 9. If every side of a triangle is doubled then percentage increase of its area is A) 100%. B) 200%. C) 300%. D) 400%. Show Answer Correct Answer: C) 300%. 10. Another name for Heron's formula is: A) Hero's formula. B) Thales formula. C) Section formula. D) None of these. Show Answer Correct Answer: A) Hero's formula. 11. If the area of an equilateral triangle is 16 $\sqrt[]{3}$ A) 48 cm. B) 24 cm. C) 12 cm. D) 36 cm. Show Answer Correct Answer: B) 24 cm. 12. The base of a right triangle is 48 cm and it's hypotenuse is 50 cm long. The area of the triangle is ..... A) 168 cm$^{2}$. B) 252 cm$^{2}$. C) 336 cm$^{2}$. D) 504 cm$^{2}$. Show Answer Correct Answer: C) 336 cm$^{2}$. 13. If the perimeter of a rhombus is 20 cm & one of its diagonals is 8 cm. The area of the rhombus is A) 24 sq cm. B) 48 sq cm. C) 50 sq cm. D) 30 sq cm. Show Answer Correct Answer: A) 24 sq cm. 14. 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. 15. The base and corresponding altitude of a parallelogram is 10 cm and 3.5 cm respectively. The area of the parallelogram = ..... A) 35 cm$^{2}$. B) 17.5 cm$^{2}$. C) 30 cm$^{2}$. D) 350 cm$^{2}$. Show Answer Correct Answer: A) 35 cm$^{2}$. 16. What is the area of an equilateral triangle with side 2 cm? A) $\sqrt{6}$. B) $\sqrt{8}$. C) $\sqrt{3}$. D) 4 sq.cm. Show Answer Correct Answer: C) $\sqrt{3}$. 17. A rhombus shaped sheet with perimeter with 40cm and diagonal 12cm.Find the area of rhombus. A) 16 sq cm. B) 48 sq cm. C) 400 sq cm. D) 40 sq cm. Show Answer Correct Answer: B) 48 sq cm. 18. 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. Show Answer Correct Answer: D) 60 cm. 19. An isosceles right triangle has area 8 cm$^{2}$. The length of its hypotenuse is A) $\sqrt[]{32}$. B) $\sqrt[]{16}$. C) $\sqrt[]{48}$. D) $\sqrt[]{24}$. Show Answer Correct Answer: A) $\sqrt[]{32}$. 20. Find the area of a triangle in which the base is 34 cm and the height is 9 cm A) 612 cm$^{2}$. B) 306 cm$^{2}$. C) 153 cm$^{2}$. D) 513 cm. Show Answer Correct Answer: C) 153 cm$^{2}$. 21. The area of a triangle is 120 $m^2$ A) 6 m. B) 2400 m. C) 60 m. D) 12 m. Show Answer Correct Answer: D) 12 m. 22. What is the area of an equilateral triangle with side $\frac{\sqrt{3}}{4}?$ A) $\frac{2}{27}cm^2$. B) $\frac{2}{15}cm^2$. C) $\frac{3}{16}cm^2$. D) $\frac{3}{14}cm^2$. Show Answer Correct Answer: C) $\frac{3}{16}cm^2$. 23. 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. 24. The base of a right triangle is 8 cm and hypotenuse is 10 cm. Its area will be A) 24 cm$^{2}$. B) 40 cm$^{2}$. C) 48 cm$^{2}$. D) 80 cm$^{2}$. Show Answer Correct Answer: A) 24 cm$^{2}$. 25. 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) $A=\sqrt{s\left(s+a\right)\left(s+b\right)\left(s+c\right)}$. C) $A=\sqrt{\left(s+a\right)\left(s+b\right)\left(s+c\right)}$. D) $A=\sqrt{s\left(s\times a\right)\left(s\times b\right)\left(s\times c\right)}$. Show Answer Correct Answer: A) $A=\sqrt{s\left(s-a\right)\left(s-b\right)\left(s-c\right)}$. ← PreviousNext →Related QuizzesClass 9 Maths Chapter 12 Heron'S Formula Quiz 1Class 9 Maths Chapter 12 Heron'S Formula Quiz 2Class 9 Maths Chapter 12 Heron'S Formula Quiz 4Class 9 Economics Chapter 1 The Story Of Village Palampur QuizClass 9 Economics Chapter 2 People As Resource QuizClass 9 Economics Chapter 3 Poverty As A Challenge QuizClass 9 Economics Chapter 4 Food Security In India QuizClass 9 English Chapter 1 The Fun They Had QuizClass 9 English Chapter 10 Kathmandu QuizClass 9 English Chapter 11 If I Were You QuizClass 9 English Chapter 2 The Sound Of Music QuizClass 9 English Chapter 3 The Little Girl QuizClass 9 English Chapter 4 A Truly Beautiful Mind QuizClass 9 English Chapter 5 The Snake And The Mirror QuizClass 9 English Chapter 6 My Childhood QuizClass 9 English Chapter 7 Packing QuizClass 9 English Chapter 8 Reach For The Top QuizClass 9 English Chapter 9 The Bond Of Love QuizClass 9 English Poem Chapter 1 The Road Not Taken QuizClass 9 English Poem Chapter 10 A Slumber Did My Spirit Seal QuizClass 9 English Poem Chapter 2 Wind QuizClass 9 English Poem Chapter 3 Rain On The Roof QuizClass 9 English Poem Chapter 4 The Lake Isle Of Innisfree QuizClass 9 English Poem Chapter 5 A Legend Of The Northland QuizClass 9 English Poem Chapter 6 No Men Are Foreign QuizClass 9 English Poem Chapter 7 The Duck And The Kangaroo QuizClass 9 English Poem Chapter 8 On Killing A Tree QuizClass 9 English Poem Chapter 9 The Snake Trying QuizClass 9 English Supplementary Chapter 1 The Lost Child QuizClass 9 English Supplementary Chapter 10 The Beggar QuizClass 9 English Supplementary Chapter 2 The Adventures Of Toto QuizClass 9 English Supplementary Chapter 3 Iswaran The Storyteller QuizClass 9 English Supplementary Chapter 4 In The Kingdom Of Fools QuizClass 9 English Supplementary Chapter 5 The Happy Prince QuizClass 9 English Supplementary Chapter 6 Weathering The Storm In Ersama QuizClass 9 English Supplementary Chapter 7 The Last Leaf QuizClass 9 English Supplementary Chapter 8 A House Is Not A Home QuizClass 9 English Supplementary Chapter 9 The Accidental Tourist QuizClass 9 Geography Chapter 1 India Size And Location QuizClass 9 Geography Chapter 2 Physical Features Of India QuizClass 9 Geography Chapter 3 Drainage QuizClass 9 Geography Chapter 4 Climate QuizClass 9 Geography Chapter 5 Natural Vegetation And Wildlife QuizClass 9 Geography Chapter 6 Population QuizClass 9 History Chapter 1 The French Revolution QuizClass 9 History Chapter 2 Socialism In Europe And The Russian Revolution QuizClass 9 History Chapter 3 Nazism And The Rise Of Hitler QuizClass 9 History Chapter 4 Forest Society And Colonialism QuizClass 9 History Chapter 5 Pastoralists In The Modern World QuizClass 9 Maths Chapter 1 Number Systems QuizClass 9 Maths Chapter 10 Circles QuizClass 9 Maths Chapter 11 Constructions QuizClass 9 Maths Chapter 13 Surface Areas And Volumes QuizClass 9 Maths Chapter 14 Statistics QuizClass 9 Maths Chapter 15 Probability QuizClass 9 Maths Chapter 2 Polynomials QuizClass 9 Maths Chapter 3 Coordinate Geometry QuizClass 9 Maths Chapter 4 Linear Equations In Two Variables QuizClass 9 Maths Chapter 5 Introduction To Euclid'S Geometry QuizClass 9 Maths Chapter 6 Lines And Angles QuizClass 9 Maths Chapter 7 Triangles QuizClass 9 Maths Chapter 8 Quadrilaterals QuizClass 9 Maths Chapter 9 Areas Of Parallelograms And Triangles QuizClass 9 Political Science Chapter 1 What Is Democracy Why Democracy QuizClass 9 Political Science Chapter 2 Constitutional Design QuizClass 9 Political Science Chapter 3 Electoral Politics QuizClass 9 Political Science Chapter 4 Working Of Institutions QuizClass 9 Political Science Chapter 5 Democratic Rights QuizClass 9 Science Chapter 1 Matter In Our Surroundings QuizClass 9 Science Chapter 10 Gravitation QuizClass 9 Science Chapter 11 Work And Energy QuizClass 9 Science Chapter 12 Sound QuizClass 9 Science Chapter 13 Why Do We Fall Ill QuizClass 9 Science Chapter 14 Natural Resources QuizClass 9 Science Chapter 15 Improvement In Food Resources QuizClass 9 Science Chapter 2 Is Matter Around Us Pure QuizClass 9 Science Chapter 3 Atoms And Molecules QuizClass 9 Science Chapter 4 Structure Of The Atom QuizClass 9 Science Chapter 5 The Fundamental Unit Of Life QuizClass 9 Science Chapter 6 Tissues QuizClass 9 Science Chapter 7 Diversity In Living Organisms QuizClass 9 Science Chapter 8 Motion QuizClass 9 Science Chapter 9 Force And Laws Of Motion Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books