Gr 9 Herons Formula

$\sqrt{6\ }cm^2$

$\sqrt{8}cm^2$

$\sqrt{3}cm^2$

$4\ cm^2$

4 cm

5 cm

3 cm

6 cm

$2\sqrt{3}cm^2$

$4\sqrt{14}cm^2$

$5\sqrt{12}cm^2$

$2\sqrt{5}cm^2$

$100\sqrt{2}cm^2$

$200\sqrt{2}cm^2$

$100\sqrt{3}cm^2$

$200\sqrt{3}cm^2$

8 cm

9 cm

10 cm

11 cm

Three sides are given

Two sides & perimeter is given

Height is given

Two sides & semi perimeter is given

4 sq.m

5 sq.m

6 sq.m

7 sq.m

$\frac{a\ +\ b\ +\ c}{2}$

$\frac{a\ +\ b\ +\ c\ }{3}$

a + b + c

abc

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

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

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

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