Area Index

Area of a Isosceles Triangle Formulas & Calculator

It is a geometric figure with 3 sides and 3 vertices, the isosceles triangle has 2 equal sides and one different; also has 3 angles 2 of them are equal. The isosceles triangles all look the same.

The area of a isosceles triangle can be calculated using the following formula: if you know the length of one of the equal sides and the other side.

Formula Knowing one of the equal sides and the other side

If you know the length of the one of the equal sides and the other side, you can calculate its area using the following formula:  $$"area" = (b * sqrt(a^2 - (b^2/4))) / 2$$

Sides Length

Area result

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Where:

$$a = "length of one of the equal sides"$$
$$b = "length of the other side"$$

Area Definition

It is the space of the internal surface in a figure, it is limited for the perimeter. Also, the area can be calculated in a plane of two dimensions.

Formula Definition

It is a representation of a rule or a general principle using letters. (Algebra, A. Baldor)
When describing formulas in plural, it is also valid to say "formulae".

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