Calculator
Mathematics

Right Triangle Solver – Pythagorean Theorem & Trigonometry Calculator

Solve a right triangle from two legs, one leg + hypotenuse, or one leg + angle. Instantly find all sides, both angles, area, perimeter and trigonometric ratios.

Tutorial / How it works →

Info

Use the right triangle solver to quickly compute sides, angles, area and perimeter using the Pythagorean theorem and trigonometric ratios. Three input modes are supported: - Two legs (a and b) → hypotenuse c via Pythagorean theorem - One leg + hypotenuse → other leg via Pythagorean theorem - One leg + angle → all sides via trigonometry Key formulas: - Pythagorean theorem: c² = a² + b² - sin(α) = opposite / hypotenuse - cos(α) = adjacent / hypotenuse - tan(α) = opposite / adjacent - Area = ½ · a · b Results are intended for educational use; use specialist software for precise engineering calculations.

How to Solve a Right Triangle
Results are rounded to 2 decimal places. Do not use this tool for critical engineering calculations.