Basics of a Circle

What is the name for the distance around a circle?

• Diameter

• Radius

• Circumference

• Chord

If my circumference is 37.68cm, what is my diameter?

• 12cm

• 118.3152cm

• 6cm

• 37.68cm

A circle is named after its what?

• Center

• Arc

• Circumference

• Secant

• Name the circle: Circle B
• Name the circle: Circle DE
• Name the circle: Circle A
• Name the circle: Circle DBC

• Diameter is: DE
• Diameter is: BA
• Diameter is: BC
• Diameter is: DC

• How many chords are there: 1
• How many chords are there: 5
• How many chords are there: 3
• How many chords are there: 0

• Chords are: WX & UV

• Chords are: OR UV, & TS

• Chords are: UV

• Chords are: YZ & AB

• Radi are: DE & BC
• Radi are: BC
• Radi are: BC, BA & BD
• Radi are: BE, DC & AD

A line in the same plane as a circle that intersects the circle at exactly one point is a ____________.

• tangent

• secant

• chord

• radius

• Secant
• Diameter
• Radius
• Chord