Circle Vocabulary

• Semicircle

• Minor Arc

• Major Arc

• Central Angle

• Diameter

The set of points equidistant from a given point.

• Circle

• Chord

• Radius

• Arc

• Diameter

A segment with endpoints on the circle.

• Circle

• Chord

• Radius

• Arc

• Inscribed Angle

An angle with a vertex on the circle, and two sides that are chords.

• Central Angle

• Diameter

• Radius

• Arc

• Inscribed Angle

The point where a tangent line intersects the circle.

• Central Angle

• Secant

• Point of Tangency

• Major Arc

• Diameter

A segment with endpoints at the center and on the circle.

• Central Angle

• Secant

• Point of Tangency

• Radius

• Diameter

An arc with endpoints on the diameter.

• Major Arc

• Chord

• Radius

• Semicircle

• Minor Arc

A portion of the edge of the circle defined by two points.

• Arc

• Chord

• Tangent

• Central Angle

• Center

A line that intersects the circle in two places.

• Arc

• Chord

• Tangent

• Central Angle

• Secant

An angle with a vertex at the center, and two sides that are radii.

• Minor Arc

• Chord

• Inscribed Angle

• Central Angle

• Secant