45 45 90 Triangle Calculator
Solve a 45-45-90 right triangle from a leg.
An isosceles right triangle with a fixed side ratio 1 : 1 : √2.
The math behind it
Both legs are equal; the hypotenuse is leg × √2.
Worked example
Leg 5 → hypotenuse 7.07.
FAQ
Half a square?
Yes — it's a square cut along its diagonal.