Right Triangle Calculator

Solve right triangles by finding missing sides and angles.

Input Method

Calculate from

Triangle Values

Side a (opposite to angle A)

Leave empty if unknown

Side b (adjacent to angle A)

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Hypotenuse c

Leave empty if unknown

Trigonometry Reference

SOH CAH TOA

sin = O/H

cos = A/H

tan = O/A

Related Calculators

Calculate area, perimeter, angles, and sides of any triangle given known values.

Calculate the missing side of a right triangle using a² + b² = c².

Calculate radius, diameter, circumference, and area of a circle from any known value.

Right Triangle Solution

Side a (opposite)3

Side b (adjacent)4

Hypotenuse c5

Angle A36.8699°

Angle B53.1301°

Area6

Perimeter12