Question

Find the area of the triangle whose sides are 12cm 5cm and 13cm

Answer 1

Answer:

2s=a+b+c/2. 12+5+

Answer 2

Answer:

By Herons formula:-

Perimeter=12+13+5=30m

Semi perimeter(s) =30/2=15m

Area of ∆=

$\sqrt{s(s - a)(s - b)(s - c)}$

a=12m, b=13m & c=5m

$\sqrt{15 \times (15 - 12)(15 - 13)(15 - 5)}$

$\sqrt{15 \times 3 \times 2 \times 10}$

$\sqrt{5 \times 3 \times 3 \times 2 \times 5 \times 2}$

$5 \times 2 \times 3$

$30 {m}^{2}$

:.Area of triangle =30m²