Circumference of Circles

what is the circumference of this circle ?

• 3.14 cm 
• 37.68 cm
• 24 cm
• 68.4 cm

Tags

CCSS.7.G.B.4

A circular swimming pool is 21 feet in diameter.
How many feet around is the pool?

• 10.5 ft
• 42 ft
• 65.94 ft
• 131.95 ft

Tags

CCSS.7.G.B.4

A diameter is _____ the radius of any circle.

• three times
• half
• two times
• one-third

The radius of a circle is ______ the diameter.

• half
• two times
• bigger than
• three times

Tags

CCSS.7.G.B.4

The ratio of circumference to diameter is 

• irrational
• half
• rational
• pi

Tags

CCSS.HSG.GMD.A.1

If the radius of a circle is 12.5 meters, the diameter is ____

• 6.25 meters
• 125 meters
• 25 meters
• 50 meters

Tags

CCSS.7.G.B.4

If the diameter of a circle is 10 mm, the circumference is approximately ___

• 314 mm
• 3.14 mm
• 31.4 mm
• 20 mm

Tags

CCSS.7.G.B.4

Meg swam from one side of her circular pool to the other side going through the center.  If Meg swam 8 feet, what is the approximate circumference of Meg's pool?

• 16 feet
• 25.12 feet
• 251.2 feet
• 4 feet

Tags

CCSS.7.G.B.4

If the radius of a circle is 18 inches, what is the approximate circumference of the circle?

• 36 inches
• 9 inches
• 11.304 inches
• 113.04 inches

Tags

CCSS.7.G.B.4

Tom measured his frisbee from the center to the outside and found it to be 6 inches.  What is the approximate circumference of Tom's frisbee?

• 37.68 inches
• 3 inches
• 12 inches
• 376.8 inches

Tags

CCSS.7.G.B.4