Area of an Isosceles Triangle Calculator

An online calculator to calculate the area of an isosceles triangle. The two sides in an Isosceles triangle are equal. These sides of the angles formed at the point where the bases are joined are also equal in length. Use this simple online Area of an Isosceles Triangle Calculator to find its area. Enter the known values of base length and side length and then click calculate button to get the resulting area. The resultant value of area is measured in square unit.

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Formula:

Area of an Isosceles Triangle = b x (√(4a2-b2) / 4 Where, b = Base Length a = Side Length

Example:

An Isosceles triangle with base length of 7 cm and side length of 9 cm. Find its area.

Solution

Area of an Isosceles Triangle = 7 x (√((4 x 92) - 72) / 4)
= 29.0205 cm2

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