Circles Vocab

Front

Set of points equidistant from a center point

Back

Circle

Front

Segment with endpoints at center and circle.

Back

Radius

Front

Segment with endpoints on a circle.

Back

Chord

Front

Chord through circle's center.

Back

Diameter

Front

A line that intersects a circle at two points.

Back

Secant

Front

A line that intersects a circle at one point.

Back

Tangent

Front

Angle with vertex at center and sides as radii.

Back

Central Angle

Front

Angle with vertex on circle and sides as chords.

Back

Inscribed Angle

Front

Edge of a circle defined by two endpoints.

Back

Arc

Front

Arc with endpoints on the diameter, equal to 180°.

Back

Semicircle