How do you calculate the area of a circle?

The area of a circle is A = pi x r^2, where r is the radius.

What is the formula for the area of a trapezoid?

The area of a trapezoid is A = (1/2) x (base1 + base2) x height, where base1 and base2 are the parallel sides.

Area Calculator

Find the area of common geometric shapes. Select a shape and enter the required dimensions to calculate its area. Supports circles, rectangles, triangles, and trapezoids.

Inputs

Shape

Length / Radius / Base

Width / Height

Top Base (trapezoid only)

Results

Area

50 sq units

Perimeter

30 units

Formula Used

A = length x width = 10 x 5

Last updated: April 16, 2026

Frequently Asked Questions

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