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Interactive Circumference of a circle

Radius, Diameter and Circumference

Explore and discover the relationship between Π, the radius, diameter and the formula for circumference of a circle. To move the circle just click and drag on either of the two points, and the circle's radius, diameter, and circumference will adjust accordingly.

$$ Circumference= 2 \cdot \pi \cdot radius $$
$$ $$

Interesting Fact about Circumference and Area


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