Circle Calculator
Calculate circle area, circumference, diameter, and radius with step-by-step solutions. Perfect for students learning geometry and circle properties.
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Step-by-Step Solution
Enter a value to see the step-by-step calculation
Understanding Circles
A circle is a perfectly round shape where every point on the edge is exactly the same distance from the center. This distance is called the radius. Circles are fundamental in geometry and appear everywhere in nature and human-made objects.
Key Circle Formulas
How to Use the Calculator
This calculator can solve for any circle property when you provide just one measurement. Simply choose what you know and enter the value:
To find all properties: Enter any one known value (radius, diameter, circumference, or area).
To find area: Enter the radius, diameter, or circumference.
To find circumference: Enter the radius, diameter, or area.
To find radius: Enter the diameter, circumference, or area.
The calculator will automatically compute all other properties and show you the step-by-step solution.
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Use Pythagorean