Question

Find the area of a triangle plot whole side are $61$ cm, $60$ cm, $11$ cm

Answer 1

Here $2s$$=$$(61+60+11)cm$

Therefore $s$$=$$\frac{132}{2}$$cm$$=$$66cm$

Here $a=61cm$ ,$b=60cm$ and $c=11cm$

Then by heron's formula,

Area of triangle $PQR$=$\sqrt{s(s-a)(s-b)(s-c)}$

$=$$\sqrt{66(66-61)(66-60)(66-11)}$

$=$$\sqrt{66\times 5\times 6\times 55}$

$=$$\sqrt{108900}$

$=$$330c{m}^2$