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Base Height
When we know the base and height it is easy to find the area.
Area is product of the base and the height of the triangle, and then divide it by two.
Herons Formula
A formula to find the area of any triangle when we know the lengths of all three of its sides.
The area of the scalene triangle is √s(s-a)(s-b)(s-c), where s = (a + b + c)/2
Equilateral
Image result for area of triangle equilateral An equilateral triangle is the one in which all three sides are equal. It is a special case of the isosceles triangle where the third side is also equal.
The formula to calculate the area of an equilateral triangle is given as, √3/4 × (side)2 square units
Area = sq units