Q. 14.0( 19 Votes )

Sides of a triangle are cm 45 cm, 39 cm, and 42 cm, find its area.

Answer :

To find the area of a triangle whose three sides are given we have the Heron’s formula


Where, ∆ is an area of a triangle.




And a, b, c are the three sides of the triangle


In this question, we have the three sides of the triangle which are 45cm, 39cm, and 42cm



= 63m


S - a = 63 - 45 = 18


S - b = 63 - 39 = 24


S - c = 63 - 42 = 21


Hence


= 756 sq m


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