Circles Review

Name all of the radii

• JC, KC, KH, HC

• JO, KO, CO, HO

• JC, KO, KH, HO

• JK, KC, CH, HJ

Name the diameter.

• JO

• GO

• QG

• JG

Find the length of the diameter. Only type the number.

Find the length of the radius. Only type the number.

The radius of a circle is 5 cm. 3x+7 represents the length of the diameter. Write an equation for x.

• 3x+7=5

• 3x+7=10

• 3x+7=7

• 3x+7=2.5

What is the circumference of this circle?

• 3.14 cm 
• 37.7 cm
• 24 cm
• 68.4 cm

Find the circumference of the circle.

• 38.47 cm

• 10.99 cm

• 43.96 cm

• 21.98 cm

How much fencing is required to enclose a circular garden whose radius is 19 m? Use 3.14 for pi. Only type the number for your answer.

Find the area of this circle. Use 3.14 for pi. Only type the number.

Find the area of this circle. Use 3.14 for pi. Only type the number.