Skill: trig-ratios

Right Triangle Solver

Find a missing side from an angle, find an angle from two sides, or get all three trig ratios — with every step shown.

Find a missing side

Give an acute angle and one known side; pick which side to solve for. Sides are labeled relative to the angle.

Angle θ (degrees)

Known side

Known side length

Solve for

Give two sides (labeled relative to the angle you want). The answer comes from inverse trig, in degrees.

First side length

First side is

Second side length

Second side is

Enter all three sides of a right triangle to get sin, cos, and tan as fractions and decimals.

Opposite

Adjacent

Hypotenuse