What you provide
What you provide
- Hypotenuse: Longest side opposite the right angle.
- Known perpendicular leg: Known side forming the right angle.
GEOMETRY / HYPOTENUSE AND LEG
Right Triangle Calculator
Solve the missing right-triangle leg from a hypotenuse and one known leg, then calculate area, perimeter, and an acute angle.
- 01 Calculated in this tab
- 02 Values stay in this browser tab
- 03 Use boundary
Use boundary
Calculation path
The known leg square is subtracted from the hypotenuse square before taking the positive square root.
Calculation path
Missing leg = sqrt(hypotenuse^2 - known leg^2).
What you receive
What you receive
- Missing perpendicular leg
- Area and perimeter
- Acute angle opposite the known leg
Use boundary
Choose the maximum decimal places shown. This does not increase source accuracy.
The hypotenuse must be strictly longer than the known leg; outputs assume an exact 90-degree angle.
This is an educational planning result, not a structural, electrical, thermal, solar, battery, generator, or safety design. Confirm specifications, units, codes, and professional requirements before acting.