Class 9
chapter 12: Heron's formula
of a triangle using Heren's
formula (without proof)
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In geometry, Heron's formula (sometimes called Hero's formula), named after Hero of Alexandria, gives the area of a triangle when the length of all three sides are known. Unlike other triangle area formulae, there is no need to calculate angles or other distances in the triangle first.
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Area of a triangle – By Heron’s formula
Area of a ΔABC, given sides a, b, c by Heron’s formula (also known as Hero’s Formula) is:
Heron’s Formula Class 9-3
Triangle ABC
Find semi perimeter (s) = (a + b + c)/2
Area = √[s(s – a)(s – b)(s – c)]
This formula is helpful to find the area of a scalene triangle, given the lengths of all its sides.
To know more about Heron’s
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