Circumference and Parts of the Circle

What is the length around a circle called?

• the radius

• the diameter

• the circumference

Name the pictured part of the circle.

• Diameter

• Sector

• Radius

• Chord

• Arc

Name the circle part shown

• Arc

• Sector

• Chord

• Radius

Name the circle part shown in red

• Diameter

• Circumference

• Radius

• Perimeter

Which segment is the diameter?

c

BD

CE

CD

Match the line segment to the correct part of a circle

• Chord

• JG

• Radius

• JH

• Diameter

• LM

Which segment is a radius?

b

DC

BD

LM

ML

Label each line or segment of the circle.

b

c

d

e

a

Diameter

Tangent

Secant

Radius

Chord

Name the pictured part of the circle.

• Diameter

• Sector

• Radius

• Central Angle

• Arc

Match the following part of the circle with its correct label.

• Point S

• Diameter

• Center

• Tangent Line

• Chord

• Radius