Label Parts of a Circle

Label the part of the circle shown in the diagram

i

sector

circumference

arc

radius

chord

tangent

centre

segment

diameter

Match the part of a circle with its definition

• A straight line that joins two points on the circumference of a circle

• Sector

• A part of the circumference of the circle

• Radius

• A part of a circle formed by two radii and an arc

• Arc

• A line that crosses a circle, passing through the centre

• Chord

• A line from the centre of the circle to a point on the circumference

• Diameter

Name the pictured part of the circle.

• Center

• Diameter

• Radius

• Arc

Select each Radius in the image.

Name the pictured part of the circle.

• Radius

• Central Angle

• Diameter

• Center

• Arc

Name the pictured part of the circle.

• Diameter

• Sector

• Radius

• Chord

• Arc

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

• Radius

• Diameter

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

• Radius

• Diameter

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

• Radius

• Diameter

From the center of this CD to the edge of the CD is 4 inches. How far is the distance all the way across the CD?

• 16 in

• 8 in

• 12 in

• 2 in