Question

The side of a triangle are 8cm,15cm,17cm.Find it's area

Answer 1

let ,a=8cm

b=15cm

c=17cm

s=a+b+c/2

s=20cm

area of triangle=√s(s-a)(s-b)(s-c)

(this is called heron's formula so by this u can find the area of triangle)

Answer 2

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

$s = \frac{8 + 15 + 17}{2}$

$s = 20$

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

$area = \sqrt{20(20 - 8)(20 - 15)(20 - 17)}$

$area = \sqrt{20 \times 12 \times 5 \times 3}$

$area = \sqrt{3600} \\ \\ area = 60cm {}^{2}$

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