Circles

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

• C = π r
• C = 2 π r
• C = π d
• C = 2 π d

If the area of a circle is 25 π in² , then the diameter is?

• 10 in
• 5 in
• 25 in
• pi in

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 44 π feet, what is the radius?

• 22 ft
• 44 ft
• 33 feet
• 3.14 feet

Which segment is the diameter?

• AC
• BD
• LM
• CE

Which segment is a radius?

• LM
• DC
• BD
• ML

If the area of circle is 100 π , find the radius of the circle.

• 10 π
• 10
• 50
• 50 π

Find the area of the circle

• 43.96
• 153.86
• 87.82
• 307.72

Find the area of the circle

• 56.52
• 254.34
• 1017.36
• 113.04

find the area of the circle below.

• 100 cm
• 225 cm
• 9 cm
• 28.26 cm