HERONS FORMULA

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

• 64 m²

• 48 m²

• 84 m²

• 54 m²

Which of the following is Heron's Formula for finding area of triangle

•  $A=\sqrt{s\left(s-a\right)\left(s-b\right)\left(s-c\right)}$  

•  $A=\sqrt{s\left(s+a\right)\left(s+b\right)\left(s+c\right)}$  

•  $A=\sqrt{\left(s+a\right)\left(s+b\right)\left(s+c\right)}$  

•  $A=\sqrt{s\left(s\times a\right)\left(s\times b\right)\left(s\times c\right)}$  

Let a,b,c are the sides of a triangle.Then Semi perimeter S is

• $\frac{a\ +\ b\ +\ c}{2}$

• $\frac{a\ +\ b\ +\ c\ }{3}$

• a + b + c

• abc

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

• 1000 cm²

• 5000 cm²

• 9000 cm²

• 8000 cm²

The area of triangle with given two sides 18 cm and 10 cm respectively and perimeter equal to 42 cm is:

• $20\sqrt{11}cm^2$

• $19\sqrt{11}cm^2$

• $22\sqrt{11}cm^2$

• $21\sqrt{11}cm^2$

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

• $32\ cm^2$

• $54\ cm^2$

• $67\ cm^2$

• $72\ cm^2$

The sides of a triangle are 15 cm, 17 cm and 8 cm. What is its area?

• $20\ cm^2$

• $40\ cm^2$

• $60\ cm^2$

• $80\ cm^2$

If the perimeter of an equilateral triangle is 60 cm, then what is its area?

• $100\sqrt{2}cm^2$

• $200\sqrt{2}cm^2$

• $100\sqrt{3}cm^2$

• $200\sqrt{3}cm^2$

Length of one of the equal sides of an isosceles triangle is 4 cm. If its perimeter is 14 cm, then what is its area?

• $7\sqrt{3}cm^2$

• $3\sqrt{7}cm^2$

• $7\sqrt{7}cm^2$

• $21cm^2$

4. The sides of a triangle are 3 cm, 5 cm and 6 cm. What is its area?

• $2\sqrt{3}cm^2$

• $4\sqrt{14}cm^2$

• $5\sqrt{12}cm^2$

• $2\sqrt{5}cm^2$