CBA 5 Corrections

Is this statement right?

The blue line = circumference.

• Yes

• No

Name the pictured part of the circle.

• Diameter

• Sector

• Radius

• Central Angle

• Arc

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

• Radius
• Diameter

How do you find the radius of a circle?

• Divide the diameter by 2

• Multiply the diameter by 2

• Divide by pi

• Cry....

How do you find the diameter of a circle

• Multiply by pi

• Multiply the radius by 2

• Divide the radius by 2

• It's impossible...

What is the approximate value of pi?

• No one knows

• 3.14

• 1

• 6.28

Which formula is used to find the circumference of a circle?

(Select all that apply.)

The diameter of circle X is 15 centimeters. The diameter of circle Y is 20 centimeters.

What is the difference between the circumference of circle X and the circumference of circle Y in centimeters?

Find the Circumference (round to nearest tenth):
radius = 6 cm

• 37.7 cm
• 37.8 cm
• 37 cm
• 18.8 cm

Which definition best describes π?

• The ratio of the circumference of a circle to its diameter

• The ratio of the circumference of a circle to its radius

• The radius of a circle times 2 times 3.14

• The diameter of a circle times 3.14