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Area of isosceles triangle

In an isosceles triangle, two sides are equal in length. An isosceles triangle also has two angles of the same measure,namely, the angles opposite to the two sides of the same length, this fact is the content of the isosceles triangle theorem, which was stated by Euclid.

Some mathematicians define an isosceles triangle to have exactly two equal sides, whereas others define an isosceles triangle as one with at least two equal sides.

b 4*4a 2-b 2

Area of isosceles triangle = Where a = length of two equal side , b= length of base of isosceles triangle

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