RS Aggarwal & V Aggarwal - Mathematics

Book: RS Aggarwal & V Aggarwal - Mathematics

Chapter: 7. Areas

Subject: Mathematics - Class 9th

Q. No. 9 of CCE Questions

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9

The length of the three sides of the triangular field are 40 m, 24 m and 32 m respectively. The area of the triangle is –

It is given in the question that,

Sides of the triangle = 40 m, 24 m and 32 m


Semi-perimeter, s =


=


= 48 cm


Now, by using Heron’s formula we get:


Area of triangle =


=


=


= 384 m2


Hence, option (c) is correct

9

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