Calculate area and perimeter of triangle, circle, rectangle
Area, perimeter, and volume for common shapes
Geometry deals with shapes, sizes, and properties of figures. Mastering key formulas lets you solve real-world problems in construction, engineering, design, and everyday life. 2D Shapes: Square: Area = s², Perimeter = 4s. Rectangle: Area = l×w, Perimeter = 2(l+w). Circle: Area = πr², Circumference = 2πr. Triangle: Area = ½bh, Perimeter = a+b+c. Trapezoid: Area = ½(a+b)h. 3D Shapes: Cube: Volume = s³, Surface = 6s². Rectangular box: Volume = l×w×h. Cylinder: Volume = πr²h, Surface = 2πr(r+h). Sphere: Volume = (4/3)πr³, Surface = 4πr². Pythagoras theorem: In a right triangle, a² + b² = c² where c is the hypotenuse. Used to find a missing side or verify a right angle. Pi (π): The ratio of a circle's circumference to its diameter. π ≈ 3.14159. It appears in all circular and spherical calculations.
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.