Right triangle: a² + b² = c²—find hypotenuse c or a missing leg from the other two sides.
How to use
- Choose hypotenuse vs leg mode.
- Enter known positive side lengths.
Example
Legs 3 and 4 → hypotenuse 5.
Notes
Right triangles only; keep units consistent.
Frequently asked questions
Pythagorean theorem?
Right triangle: a² + b² = c² with c the hypotenuse.
Which side is the hypotenuse?
Hypotenuse is the longest side, opposite the right angle.
Decimals allowed?
Yes—positive lengths; hypotenuse must exceed a leg when solving for a leg.
Non-right triangles?
No—this theorem is for right triangles only.
Can I save my inputs?
Yes. Copy link below the form keeps your current inputs so you can share the scenario or save it for later.