A right triangle is a triangle with one 90-degree angle. The two sides forming the right angle are called legs, and the longest side opposite the right angle is called the hypotenuse.
In a right triangle, the square of the hypotenuse equals the sum of squares of the other two sides.
Functions that describe the relationship between angles and sides in a right triangle.
Calculate the sides, angles, area, and perimeter of right triangles.
Enter 2 side lengths or 1 side and 1 angle to calculate the rest. Angle C is always 90° (right angle).
The most important formula for right triangles. The square of the hypotenuse equals the sum of squares of the other two sides.
a² + b² = c²
The area of a right triangle is half the product of the base and height.
Area = (a × b) / 2
Commonly used right triangles with special ratios.
Used in architecture, surveying, navigation, physics and many other fields to calculate distances and heights.
Trigonometric ratios (sin, cos, tan) are functions that describe the relationship between angles and side lengths in right triangles.
The sum of interior angles in any triangle is 180°. Since one angle is 90° in a right triangle, the other two angles sum to 90°.