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Area Calculator

Calculate area for circles, rectangles, triangles, and more with professional geometric precision.

Circle Dimensions

Calculated Area

---units²

Diagram

r

This geometry solver is useful for architects, construction project managers, and students analyzing spatial dimensions and material requirements for 2D surfaces.

Related Calculators

Mastering Geometric Area Analysis

In the science category, area is the measure of the size of a two-dimensional surface. This geometry solver provides a comprehensive suite of tools to calculate the enclosed space of common shapes including circles, rectangles, triangles, trapezoids, and ellipses.

Accurate area calculation is the foundation of many larger scientific endeavors. From determining the pressure exerted on a surface in physics to calculating the photosynthetic potential of a leaf in biology, the ability to quantify 2D space is indispensable.

Area Formulas for Common Shapes

ShapeFormulaVariables
CircleA = πr²r = Radius
RectangleA = l × wl=Length, w=Width
TriangleA = ½bhb=Base, h=Height
TrapezoidA = ½(a+b)ha,b=Bases, h=Height

Geometry FAQ

Why is area measured in square units?

Area represents the number of unit squares that would fit inside the shape. It is a two-dimensional measurement requiring two linear units to be multiplied together.

What is 'Pi' and why is it used for circles?

Pi (π) is the mathematical constant representing the ratio of a circle's circumference to its diameter (~3.14159). It is essential for calculating area and volume for any curved surface.