Circles Quiz

What is the measurement around the outside of a circle called?

• Diameter

• Circumference

• Radius

• Center

What is the line that goes from the center of a circle to any point on the circle?

• Diameter

• Circumference

• Chord

• Radius

What is the diameter?

• 5 in
• 10 in
• 3.14 in
• 15.84 in

If the radius of a circle is 10 cm, the circumference is about 30 cm.

• TRUE
• FALSE

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area?

• 31.25 m²
• 29.55 m²
• 30.36 m²
• 28.26 m²

Alex has trained his puppy, Zoey, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft

• 12.25 ft

• 10.99 ft

• 8.75 ft

A circle has a diameter of 4.5 cm. A larger circle has a diameter of 24 cm. What is the approximate difference in the circumferences of the two circles?

• 19.5 cm

• 28.5 cm

• 61 cm

• 90 cm

What is the perimeter of this semi circle? (Use 3.14 = π and round to the nearest tenths place)

• 12.6
• 20.6
• 25.1
• 33.1

If you are placing a fence around a circular garden, which of the following are you solving for?

• Area
• Circumference
• Radius
• Diameter

The circumference is 62.8 inches. What is the radius? (Use 3.14 for π)

• 20 inches

• 10 inches

• 6.28 inches

• 31.4 inches