Circles

What is the formula for circumference of a circle given the diameter?

• C = π r

• C = 2 π

• C = π d

• C = 2 π d

If the circumference of a circle is 22 π ft, what is the radius?

• 22 ft
• 11ft
• π ft
• no ft

If the circumference of a circle is 22π , what is the diameter?

• 22 ft
• 11 ft
• π ft
• 0 ft

If the circumference of a circle is 44 π feet, what is the radius?

• 22 ft
• 44 ft
• 33 feet
• 3.14 feet

The _____ is the distance from the center to any point on the circle.

• diameter
• radius
• π
• center

The distance across a circle through its center is called the _____.

• diameter
• radius
• π
• center

Which segment is the diameter?

• AC
• BD
• LM
• CE

The definition of circumference is

• distance from the center of any point on the circle

• distance from one point to another

• distance around the circle

• distance from the center of any point on the circle

Find the radius of the circle

• 20 ft

• 10 ft

• 5.5 ft

• 10

find the diameter of the circle

• 14 m

• 7 m

• 14

• 3.5 m