Circle
Triangle
Rectangle
Square
Sphere
Cylinder
r

Circle with radius (r)

b h

Triangle with base (b) and height (h)

Geometry Formulas

Circle
Area = π × r²
Circumference = 2 × π × r
Diameter = 2 × r

Where r is the radius and π ≈ 3.14159

Triangle
Area = ½ × b × h
Perimeter = a + b + c

Where b is base, h is height, and a, b, c are sides

Rectangle
Area = l × w
Perimeter = 2 × (l + w)

Where l is length and w is width

Square
Area = a²
Perimeter = 4 × a

Where a is side length

Sphere
Volume = (4/3) × π × r³
Surface Area = 4 × π × r²

Where r is radius

Cylinder
Volume = π × r² × h
Surface Area = 2 × π × r × (r + h)

Where r is radius and h is height

Geometry Examples

Example 1: Circle

Problem: Find the area and circumference of a circle with radius 5 cm.

Area = π × (5)² = 3.14159 × 25 = 78.54 cm²
Circumference = 2 × π × 5 = 31.42 cm
Example 2: Triangle

Problem: Find the area of a triangle with base 8 m and height 5 m.

Area = ½ × 8 × 5 = 20 m²
Example 3: Rectangle

Problem: Find the perimeter of a rectangle with length 12 ft and width 8 ft.

Perimeter = 2 × (12 + 8) = 40 ft

About Geometry Calculations

2D Shapes

Calculate area and perimeter of circles, triangles, rectangles, squares, and other polygons.

3D Shapes

Compute volume and surface area of spheres, cylinders, cones, cubes, and other solids.

Accurate Formulas

Uses precise mathematical formulas with high-precision calculations.

Multiple Units

Supports various measurement units including meters, centimeters, inches, and feet.

Educational

Perfect for students, teachers, and professionals learning or teaching geometry.

Easy to Use

Simple interface with visual diagrams and step-by-step calculations.