Calculate area and perimeter of triangle, circle, rectangle
About geometry calculations
In right triangle: a² + b² = c² where c is hypotenuse.
Other useful tools related to mathematical calculations
How to Use? Select shape and enter measurements. Area and perimeter calculated automatically. For triangles, entering two sides applies Pythagorean theorem.
Area using Heron's formula, hypotenuse using Pythagorean theorem
Area = πr², Circumference = 2πr
Area = width × height
Automatic results based on input
About geometry calculations
In right triangle: a² + b² = c² where c is hypotenuse.