A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre.

The distance between any of the points and the centre is called the radius.

The circle has been known since before recorded history. Early humans saw circles in the sun, moon, and other natural forms.

In mathematics, the study of circles led to the development of geometry and trigonometry.

A circle's circumference is π times its diameter. Its area is π times the square of its radius.

Circles are a symbol of perfection, eternity, and unity in many cultures and religions.

In sacred geometry, circles are used to represent cycles, wholeness, and the divine.

Ancient astronomers and philosophers saw circles as the most perfect form in the cosmos.

The compass, used to draw circles, is also a symbol of divine construction and knowledge.

Mandala art, common in spiritual traditions, is centered on circular patterns symbolizing the universe.