Right Triangle Calculator
Angles, Sides & Trig โก
Enter any two values to find all sides and angles of a right-angled triangle, including sine, cosine and tangent.
Enter any two values โ leave the rest blank
Enter any two values to find all sides and angles of a right-angled triangle, including sine, cosine and tangent.
Enter any two values โ leave the rest blank
sin(ฮฑ) = opposite รท hypotenuse = b รท c
cos(ฮฑ) = adjacent รท hypotenuse = a รท c
tan(ฮฑ) = opposite รท adjacent = b รท a
The three angles always sum to 180ยฐ, with the right angle = 90ยฐ, so ฮฑ + ฮฒ = 90ยฐ.
What is SOH CAH TOA?
A memory aid for trigonometric ratios: Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, Tangent = Opposite/Adjacent.
Can I find angles from sides?
Yes โ enter two sides and the calculator finds all angles using inverse trig functions (arcsin, arccos, arctan).
What is the difference between degrees and radians?
A full circle is 360ยฐ or 2ฯ radians. This calculator uses degrees โ the most common unit for everyday use.