使用勾股定理计算三角形的边。立即找到缺少的边、面积和周长。
The Pythagorean theorem states that in a right triangle, the square of the hypotenuse (c) equals the sum of the squares of the other two sides: a² + b² = c². This fundamental geometric principle, discovered by Pythagoras, is used in construction, navigation, physics, and everyday measurements.
To find a missing side, enter the two known sides and leave one blank. The calculator solves for the missing value using the theorem. If you enter all three sides, it verifies whether they form a valid right triangle. The calculator also computes the triangle's area (½ × a × b) and perimeter (a + b + c).
Choose units for each side from millimeters to nautical miles. The calculator automatically converts between units and displays results in a common unit. This is useful when working with mixed measurements or different unit systems.
Right triangles appear in roofs, ramps, ladders, screen dimensions, and countless real-world applications. Use this calculator for homework, construction projects, or any situation requiring precise right triangle calculations.
If side a = 3 cm and side b = 4 cm, then the hypotenuse c = 5 cm because 3² + 4² = 9 + 16 = 25 = 5². The area is 6 cm² and the perimeter is 12 cm.