herons formula

10 cm

40 cm

35 cm

60 cm

$\sqrt{6\ }cm^2$

$\sqrt{8}cm^2$

$\sqrt{3}cm^2$

$4\ cm^2$

$2\sqrt{3}cm^2$

$4\sqrt{14}cm^2$

$5\sqrt{12}cm^2$

$2\sqrt{5}cm^2$

$100\sqrt{2}cm^2$

$200\sqrt{2}cm^2$

$100\sqrt{3}cm^2$

$200\sqrt{3}cm^2$

$20\ cm^2$

$40\ cm^2$

$60\ cm^2$

$80\ cm^2$

$\frac{1}{2}\times b\times h$

2 x b x h

2b x 2h

$\frac{1}{2}\times b\times h$

$x+x+x\ \left(\ total\ sides\right)$

$x\times x\times x\left(total\ sides\right)$

triangle with 2 sides same and 1 diff.

triangle with all sides diff.

triangle with all sides equal

triangle with one right angle measure and other with other measures

traingle with all every angle with 90 degree

triangle which has 2 right angle measure

triangle with 2 angles equal

triangle with 2 sides equal

triangle with all 90 degree as a measure

triangle with all sides equal