Circles - parts,area,circumference

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.

• Diameter

• Sector

• Radius

• Chord

• Arc

A diameter is also a chord. 

• True
• False 

What is the diameter?

• 8
• 16
• 10
• 4

Match the following.

• Semicircle

• 
• Minor Arc

• 
• Major Arc

• 

Match the following. The arrow is pointed at what part of the circle.

• Central Angle

• 
• Intercepted Arc

• 
• Inscribed Angle

• 

How many degrees are there in a circle?

• 90

• 180

• 360

• 720

Find the circumference with a diameter of 18.4 km. Use 3.14 for pi.

• 23.7 km

• 57.8 km

• 19.3 km

• 59.1 km

Find the circumference of the circle.

• 31.4 cm

• 78.5 cm

• 314 cm

• 15.7 cm