Right Triangle Calculator
Solve right triangles using the Pythagorean theorem and trigonometry
Right Triangle Solver
Results
Right Triangle Formulas
Pythagorean Theorem
• a² + b² = c²
• c = √(a² + b²)
• a = √(c² - b²)
• b = √(c² - a²)
Trigonometric Ratios
• sin(A) = opposite/hypotenuse = a/c
• cos(A) = adjacent/hypotenuse = b/c
• tan(A) = opposite/adjacent = a/b
• A + B = 90° (complementary angles)
Frequently Asked Questions
A right triangle is a triangle with one 90-degree angle. The side opposite the right angle is called the hypotenuse, and it's always the longest side.
Tips
- Enter the dimensions in the same unit for consistency.
- Results update automatically as you type.
- Use the unit selector to convert between different measurement systems.