Show HN: A simple right-angle calculator

Instant right-triangle calculator, with a cool visualization.
Solve any right triangle with just two known values.

Enter Known Values

Results

Enter any two known values (sides or angles) of your right triangle, then click the Calculate button to compute all the remaining values. The calculator uses the Pythagorean theorem and trigonometric functions to solve for unknown sides and angles. You can also press Enter after typing a value for quick calculation.

Formulas Used:

• Pythagorean Theorem: a² + b² = c²
• Sine: sin(angle) = opposite / hypotenuse
• Cosine: cos(angle) = adjacent / hypotenuse
• Tangent: tan(angle) = opposite / adjacent
• Area: ½ × base × height
• Perimeter: a + b + c

Calculating Right Triangles

The Pythagorean theorem states that in a right triangle, the square of the hypotenuse (c) equals the sum of squares of the other two sides. Enter any two sides in the calculator above to find the third!

Triangle Area

The area of a right triangle is half the product of its base and height. Our calculator automatically computes this when you enter two sides. Try it above!

Finding Angles

Trigonometric functions help find angles from sides. Enter any two values in the calculator above, and it will instantly compute all angles using sine, cosine, and tangent.