Circle Vocab

A segment that goes from the center to a point on the circle

• Diameter

• Radius

• Central Angle

• Chord

A segment whose endpoints are ON the circle

• Radius

• Diameter

• Chord

• Secant

A part of the distance around the circle

• Arc Length

• Major Arc

• Minor Arc

• Circumference

A chord that goes through the center

• Central Angle

• Secant

• Diameter

• Radius

An arc that is half the circle (180°)

• Circumference

• Major Arc

• Minor Arc

• Semicircle

Set of all points equidistance from a given point

• Circle

• Radius

• Diameter

• Concentric Circles

The full distance around the circle

• Major Arc

• Arc Length

• Circumference

• Circle

An angle whose vertex is ON the circle

• Radius

• Inscribed Angle

• Central Angle

• Chord

An arc that is less than half the circle

• Minor Arc

• Semicircle

• Major Arc

• Point of Tangency

An arc that is more than half the circle

• Semicircle

• Circumference

• Minor Arc

• Major Arc