Class 9 Heron’s Formula Quiz Set 1

1. The perimeter of an equilateral triangle is 60 m. The area is

 
 
 
 

2. A quadrilateral whose sides are 3cm, 4cm, 4cm, 5cm and one of the diagonal is equal to 5cm as per the below figure. The area of the quadrilateral is:

 
 
 
 

3. The perimeter of an equilateral triangle is 60 m. The area is:

 
 
 
 

4. The perimeter of a right triangle is 60 cm and its hypotenuse is 26 cm. The other two sides of the triangle are

 
 
 
 

5. 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

 
 
 
 

6. Each of the two equal sides of an isosceles right triangle is 10 cm long. Its area is

 
 
 
 

7. If the perimeter of an equilateral triangle is 180 cm. Then its area will be:

 
 
 
 

8. The sides of a triangle are 56 cm, 60 cm and 52 cm long. Then the area of the triangle is

 
 
 
 

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:

 
 
 
 

10. The base of a right triangle is 48 cm and its hypotenuse is 50 cm. The area of the triangle is

 
 
 
 

11. The length of each side of an equilateral triangle having an area of 9√3 cm² is

 
 
 
 

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

 
 
 
 

13. Area of the triangle is equal to:

 
 
 
 

14. The base of an isosceles triangle is 6 cm and each of its equal sides is 5 cm. The height of the triangle is

 
 
 
 

15. The base of an isosceles triangle is 16 cm and its area is 48 cm². The perimeter of the triangle is

 
 
 
 

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