Unit 10 Vocabulary

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

• Radius

• Circle

• Diameter

• Chord

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

• Circle

• Diameter

• Chord

• Radius

A segment with endpoints on the circle

• chord

• radius

• diameter

• secant

a line that intersects the circle in two places

• radius

• chord

• secant

• diameter

a chord that passes through the center

• tangent

• secant

• diameter

• chord

a line that intersects the circle at exactly one place.

• diameter

• tangent

• secant

• chord

the point at which the tangent line intersects the circle

• point of tangency

• tangent

• secant

• diameter

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

• central angle

• inscribed angle

• minor angle

• major angle

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

• central angle

• inscribed angle

• arc

• Circle

a portion of the edge of the circle defined by two endpoints

• minor arc

• major arc

• arc

• tangent