Circle Vocabulary

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

• Circle

• Tangent

• Semicircle

• Diameter

• Chord

A segment with endpoints at the center and on the circle

• Secant

• Arc

• Radius

• Diameter

• Tangent

A segment with endpoints on the circle (One of the most popular is the Diameter)

• Secant

• Chord

• Radius

• Arc

• Tangent

Tags

CCSS.HSG.C.A.2

A chord that passes through the center (Equals 2 Radius)

• Secant

• Circle

• Arc

• Diameter

• Tangent

A line that intersects the circle in two places

• Secant

• Radius

• Arc

• Diameter

• Tangent

A line that intersects the circle at exactly one place

• Secant

• Radius

• Arc

• Diameter

• Tangent

The point at which the tangent line intersects the circle

• Major Arc

• Minor Arc

• Inscribed Angle

• Central Angle

• Point of Tangent

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

• Major Arc

• Minor Arc

• Inscribed Angle

• Central Angle

• Point of Tangent

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

• Major Arc

• Minor Arc

• Inscribed Angle

• Central Angle

• Point of Tangent

• Arc

• Secant

• Tangent

• Chord

• Radius