Class 9th mathematics(heron's formula)

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Notes for Heron’s Formula
Basic Concepts And Important Points
1.   For a triangle with length of sides a, b and c, perimeter = a + b + c
2.   Area of a triangle 
3.   Area of an isosceles triangle with length of two equal sides a and base 
4.   Area of an equilateral triangle 
5.   Altitude of an equilateral triangle 
6.   Heron’s formula: If a, b, c denote the lengths of the sides of a triangle, then area of triangle.
       

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