Radius, Diameter, Circumference, Area

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

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.

Sally has car tire with a circumference of 75.36 ft. What is the radius of the car tire and what is the diameter? (Use 3.14 for pi)

• r=12 ft

• d=26 ft

• r=13 ft

• d=24 ft

What is the radius measurement? ​ (a)  

• 6 cm

• 12 cm 

• 24 cm

If my circumference is 37.68cm, what is my diameter?

• 12 cm

• 118.3152 cm

• 6 cm

• 37.68 cm

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.

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