Circle Area & Circumference Practice

If my radius is 10ft, what is my diameter?

• 20ft
• 5ft
• 31.4ft
• 62.8ft

What is the circumference of this circle ?

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

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

The diameter of a circle is:

• The measurement around the circle.
• The distance from an edge of a circle to another edge.
• The distance from the center of the circle to an edge of a circle
• The distance from an edge of a circle to another edge through the center. 

What is the circumference? (use 3.14 for  $\pi$  )

• 28.26 in

• 9 in

• 56.52 in

• 18 in

Calculate the circumference. (use 3.14 for pi)

• 15.7 cm

• 62.8 cm

• 10 cm

• 31.4 cm

Find the area.

• 84.9

• 32.7

• 51.3

• 16.3

At Palermo Pizzeria pizzas are sold by their diameter. Rihanna orders a 14-inch pizza. Which is the closest to the area of the pizza?

• 21.98 in²

• 43.96 in²

• 153.86 in²

• 307.72 in²

The diameter of a circle measures 11 cm. What is the radius?

• 5.5 cm

• 9 cm

• 13.5 cm

• 22 cm

Is the red line a radius or diameter of the circle?

• Radius
• Diameter