Isosceles right triangle Calculator

Online calculator and formulas for calculating an isosceles, right triangle

Calculate isosceles, right triangles


This function calculates various parameters of an isosceles right triangle. Select one element and enter the appropriate value. Then click on calculate


Triangle online calculator

 Input
Decimal places
 Results
Base a
Side b
Height h
Perimeter P
Area A

Properties of the triangle

The cathets are the two sides at right angles. The hypotenuse is the side opposite the right angle.

The height is measured from the right angle to the hypotenuse.

Formulas for the isosceles, right triangle

Side \(\displaystyle b\)
\(\displaystyle b=\frac{a}{\sqrt{2}}\)
Height \(\displaystyle h\)
\(\displaystyle h=\frac{a}{2}\)
Perimeter\(\displaystyle P\)
\(\displaystyle P=(1+\sqrt{2})· a\)

Area \(A\)

\(\displaystyle A=\frac{a^2}{4}\)
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