Circles Vocab

A set of points all equidistant from a given point (the center)

• Circle

• Chord

• Diameter

• Tangent

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

• Chord

• Diameter

• Arc

• Radius

A segment with end points on the circle.

• Radius

• Diameter

• Chord

• Tangent

Tags

CCSS.HSG.C.A.2

A chord that passes through the center of a circle.

• Diameter

• Radius

• Secant

• Minor Arc

A line that intersects the circle in two places.

• Tangent

• Secant

• Diameter

• Chord

A line that intersects the circle at exactly one place.

• Chord

• Inscribed Angle

• Radius

• Tangent

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

• Inscribed Angle

• Central Angle

• Arc

• Tangent

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

• Radius

• Central Angle

• Inscribed Angle

• Semicircle

Tags

CCSS.HSG.C.A.2

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

• Radius

• Arc

• Inscribed Angle

• Secant

An arc with endpoints on the diameter. Always equal to 180°!

• Circle

• Semicircle

• Major Arc

• Central Angle