Solve for the missing side of a right triangle using the Pythagorean theorem: a² + b² = c², where c is the hypotenuse.
How it works
- Enter the two known sides.
- Leave the unknown side blank or zero.
- The calculator solves for the missing side.
Frequently asked questions
What is the hypotenuse?
The longest side, opposite the right angle.
Does this work for any triangle?
No — only right triangles (one 90° angle).
Can sides be zero?
No. All sides of a real triangle must be greater than zero.