## Circle (Radius, Diameter, Circumference)

### A circle is a two-dimensional geometric shape consisting of all points that are equidistant from a central point called the center

A circle is a two-dimensional geometric shape consisting of all points that are equidistant from a central point called the center. It is perfectly round and has no edges or corners.

– Radius: The radius of a circle is the distance from the center of the circle to any point on its circumference. It is often denoted by the letter “r”. The radius is half the length of the diameter.

– Diameter: The diameter of a circle is a straight line that passes through the center, connecting two points on the circumference. It is the longest chord (a line segment joining two points on a curve) in a circle and passes through the center point. The diameter is twice the length of the radius and is often denoted by the letter “d”.

– Circumference: The circumference of a circle is the distance around the boundary of the circle. It is the total length of the circle’s boundary. The formula to calculate the circumference is C = 2πr, where “C” represents the circumference, “π” represents the mathematical constant Pi (approximately equal to 3.14159), and “r” represents the radius of the circle.

To summarize, the radius is the distance from the center to any point on the circumference, the diameter is the distance across the circle passing through the center, and the circumference is the distance around the circle.

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