45-45-90 Triangle Calculator
Calculate the sides, area, perimeter, and other properties of a 45-45-90 triangle using the special side ratios.
45-45-90 Triangle Properties
Side Ratios
Leg : Leg : Hypotenuse = 1 : 1 : √2
where both legs are equal in lengthArea
A = ½ × a²
where a is the length of either legPerimeter
P = 2a + a√2
where a is the length of either legHeight
h = a/√2
where a is the length of either leg
Note: In a 45-45-90 triangle, both legs are equal in length, and the hypotenuse is √2 times the length of either leg.
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