Right Triangle Calculator
Calculate right-triangle legs, hypotenuse, acute angles, area, perimeter, altitude to hypotenuse, projections, medians, and circle radii.
The diagram highlights the values to enter. The right angle is at vertex C.
Right triangle sides, angles, and area
Right-triangle calculator results in English search usually include the missing side, both acute angles, area, perimeter, and useful secondary values. This page solves those from common side and angle combinations.
The hypotenuse c is found from the two legs a and b.
A right triangle area is half the product of its legs.
Frequently Asked Questions
Sources and References
- Right Triangle CalculatorCalculator.net
- Right Triangle CalculatorPixels Calculator
- Right TriangleWolfram MathWorld
Calculations are based on the listed reference sources. Links open in a new tab.
Related Tools
Solve a triangle from SSS, SAS, ASA, AAS, or SSA inputs and calculate sides, angles, area, perimeter, altitudes, medians, and circle radii.
Calculate right triangle area from two legs, leg and hypotenuse, leg and acute angle, hypotenuse and acute angle, or leg and altitude to the hypotenuse.
Find the hypotenuse, find a missing leg, or check right-triangle side relationships with the Pythagorean theorem.
Calculate triangle perimeter from three sides, one equilateral side, equal side and base, or two right-triangle legs with triangle inequality checks.