Home  >  Class 9 Math  >  Class 9 Maths Practice Test: Heron’s Formula - Heron’s Formula & Area of a Triangle by Heron’s Formula

A triangular board having sides 45m, 30m and 35m is used for advertising. One company uses this board for its advertisement for 4 months. How much rent will the company has to pay if the rent is Rs 3500 per m2?

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Heron's formula is credited to Heron of Alexandria (c. 62 ce) and is used to find the area of a triangle in terms of the lengths of its sides. In symbols, if a, b, and c are the lengths of the sides: Area = Square root of √s(s - a)(s - b)(s - c) where s is half the perimeter, or (a + b + c)/2.


A triangular board having sides 45m, 30m and 35m is used for advertising. One company uses this board for its advertisement for 4 months. How much rent will the company has to pay if the rent is Rs 3500 per m<sup>2</sup>?






 
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