Parts of a Circle

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

Name the pictured part of the circle.

• Radius

• Central Angle

• Diameter

• Center

• Arc

Name the pictured part of the circle.

• Center

• Diameter

• Radius

• Arc

What is the diameter?

• 8

• 16

• 10

• 4

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

• Chord

• Point S

• Tangent Line

• Radius

• Center

• Diameter

Name the pictured part of the circle.

• Diameter

• Sector

• Radius

• Central Angle

• Arc

Label the name of part os the circles.

c

d

e

f

g

h

i

b

a

circumference

chord

secant

radius

center

sector

segment

diameter

tangent

Label each line or segment of the circle.

b

c

d

e

a

Radius

Diameter

Chord

Tangent

Secant

Drag and Drop: Match the correct parts of a circle.

c

d

e

f

b

a

tangent

radius

secant

diameter

chord

center

What do we call the red line?
(a)  

• Chord

• Arc

• Diameter

• Segment