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

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

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

Here, a = 45cm, b = 39cm, c = 42cm 

Semi perimeter of triangle = s 

= (1/2) (a + b + c)

= (1/2) (45 + 39 + 42)

= 126/2

= 63

Area of a triangle

∴ The area of the triangle is 756 sq.cm

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