Class 9 Heron’s Formula Quiz Set 2

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

 
 
 
 

2. The perimeter of a triangle is 60cm. If its sides are in the ratio 1:3:2, then its smallest side is

 
 
 
 

3. The area of ΔABC is:

 
 
 
 

4. Each sides of an equilateral triangle measure 8 cm. The area of the triangle is

 
 
 
 

5. The area of the quadrilateral ABCD in the adjoining figure is:

 
 
 
 

6. The area of the quadrilateral ABCD in the adjoining figure is:

 
 
 
 

7. The area of trapezium in the adjoining figure is:

 
 
 
 

8. Find the area of a right triangle whose sides containing the right angle are 5cm and 6cm

 
 
 
 

9. The equal sides of isosceles triangle are 12 cm and perimeter is 30 cm. The area of this triangle is:

 
 
 
 

10. The area of an equilateral triangle is 16 m². Its perimeter is

 
 
 
 

11. If the perimeter of a rhombus is 20cm and one of the diagonals is 8cm. The area of the rhombus is

 
 
 
 

12. The sides of a triangle are in the ratio of 3 : 4 : 5. If its perimeter is 36 cm, then what is its area?

 
 
 
 

13. The lengths of a triangle are 6 cm, 8 cm and 10 cm. Then the length of perpendicular from the opposite vertex to the side whose length is 8cm is:

 
 
 
 

14. In a right triangle , < B = 90º, AC = 5cm and BC = 4cm. find AB.

 
 
 
 

15. What in the area of an equilateral triangle with side 2 cm?

 
 
 
 

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