Question

Find the area of a triangle whose sides are 18mm,24mm and 30mm​

Answer 1

Sides of Triangle are ,

   a = 18mm

   b = 24mm

   c = 30 mm

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

  $= \frac{18+24+30}{2}$

  $=\frac{72}{2}$

  $=36$

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

                        = $\sqrt{36(36-18)(36-24)(36-30)}$

                        = $\sqrt{36\times 18 \times 12 \times 6}$

                        = $\sqrt{18\times2\times18\times2\times6\times6}$

                        = $\sqrt{18\times18\times2\times2\times6\times6}$

                        = $18\times2\times6$

                        = $216\:mm^{2}$

HOPE IT HELPS U ........