Question

Find the area of triangle​

Answer 1

Step-by-step explanation:

Given Sides of a triangle

a=21 cm

b=17 cm

c=10 cm

By Heron's Formula,

$Area \: of \: Triangle= \sqrt{s(s - a)(s - b)(s - c)} \\ s = \frac{a +b +c }{2} \\ s = \frac{21 + 17 + 10}{2} \\ s = \frac{48}{2} cm \\ s = 24 \: cm \\ Area \: of \: Triangle= \sqrt{24(24 - 21)(24 - 17)(24 - 10)} \\ = \sqrt{24 \times 3 \times 7 \times 14} \\ = \sqrt{2 \times 2 \times 2 \times 3 \times 3 \times 7 \times 7 \times 2} \\ = 2 \times 2 \times 3 \times 7 \: {cm}^{2} \\ = 84 \: {cm}^{2}$

please mark as Brainliest