Question

which formula is used to find triangle, if three sides of triangle is given​

Answer 1

Answer:

If you meant area, you can use Heron's formula.

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

Hope this helps. ^_^

Answer 2

to find the area of a triangle with 3 sides given as: 3, 6, and 7, we assume that a = 3, b = 6, and c = 7. Then the semi-perimeter is, s = (a + b + c)/2 = (3 + 6 + 7)/2 = 8. We will find the area of the triangle using the Heron's formula.

A = √[s(s-a)(s-b)(s-c)]

= √[8(8-3)(8-6)(8-7)]

= √[8 × 5 × 2 × 1]

= √(80)

≈ 8.94