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

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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