Question

Find the area of a triangle whose sides are 8 cm, 11 cm and 13 cm

Answer 1

☆Hello friend☆

We xan use Heros formula :-

$\sqrt{s(s - a)(s - b)(s - c)} \: where \: \\ s = \frac{a + b + c}{2}$

$s = \frac{11 + 8 + 13}{2} = 16cm \\ \sqrt{16(16 - 11)(16 - 13)(16 - 8)} \\ \sqrt{16 \times 5 \times 3 \times 8} = \\ 2 \times 2 \times 2 \times 2 \times 2.23 \times 1.73 \times 2 \times 2 \times 2 \\ 2 \times 2 \times 2 \times 1.4 \times 2.2 \times 1.7 = 31.5 {cm}^{2}$

Hope it helps☺!