Circles Area, Circumference and Central Angles

9.The circumference of a circle is 30π. What is the radius?

• 30

• 60

• 15

• 45

7.The circumference is 62.8 inches. What is the radius?

• 20 inches

• 10 inches

• 6.28 inches

• 31.4 inches

6.Find the diameter of a circle with a circumference of 40.82 inches.

• 12 inches

• 13 inches

• 20.41 inches

• 22 inches

What is the diameter of a circle with a radius of 5.5 cm?

• 5.5 cm
• 2.25 cm
• 11 cm
• A:LKFJ:LSKFJ

Find the radius of a circle who's diameter is 40 ft.

• 40ft
• 80ft
• 20ft
• 45ft

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

• Radius
• Diameter

Find the area of the circle

• 43.96
• 153.86
• 87.82
• 307.72

What is the area of this circle?

• 8322.13
• 1134.11
• 4536.46
• 1267.09

The radius is 8 inches.  What is the circumference?

• 50.24 inches
• 25.12 inches
• 12.56 inches
• 200.96 inches

Find the circumference of the circle

• 87.82
• 153.86
• 43.96
• 307.72