Q. 44.4( 303 Votes )

Find the area of

Answer :

To find : Area of the triangle
Given:
Two sides of the triangle are 18 cm and 10 cm (Given)

Perimeter of the triangle = 42 cm

Perimeter of Triangle = Sum of sides of triangle
Let the third side of triangle be x, so
x + 18 + 10 = 42

Third side of triangle, x = 42 – (18 + 10)

= 14 cm


Semi perimeter of triangle(s) =


  = 21cm


Using Heron’s formula,


Area of the triangle =


=


=


=


= cm2

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