Geometry Terms

Front

Circle

Back

A round shape with no corners or edges, where every point is equidistant from the center.

Front

Radius

Back

The distance from the center of a circle to any point on its circumference.

Front

Centre of Circle

Back

The point that is equidistant from all points on the circumference of the circle.

Front

Diameter

Back

A straight line passing from side to side through the center of a circle, measuring twice the radius.

Front

Circumference

Back

The total distance around the circle, calculated as 2π times the radius.

Front

Chord

Back

A straight line segment whose endpoints lie on the circumference of the circle.

Front

Arc

Back

A portion of the circumference of a circle, defined by two endpoints on the circle.

Front

Sector

Back

A region enclosed by two radii and the arc between them in a circle.

Front

Tangent

Back

A line that touches the circle at exactly one point, without crossing it.

Front

Arc Length

Back

The distance along the curved line of an arc, calculated as a fraction of the circumference based on the angle subtended at the center.