Circles review

What is the radius of the circle below?

• 3 cm

• 1.5 cm

• 6cm

• I don't know

What is the radius of this circle?

• 18

• 10

• 9

• 8

What is the formula for finding the area of a circle?

• A = π·d

• C = 2·π·r

• A = π·r²

• C = π·d

If the diameter of a circle is 50 yards, the radius is _____

• 100 yards
• 25 yards
• 150 yards
• 15 yards

Find the area of the circle

• 43.96 units²

• 153.86 units²

• 87.82 units²

• 307.72units²

What is the area of this circle?

• 452.39 cm²

• 139.12 cm²

• 113.1 cm²

• 84.23 cm²

What is the area of this circle?

• 452.39 cm²

• 139.12 cm²

• 113.1 cm²

• 84.23 cm²

(a)   is the distance around a circle.

• Circumference
• Area

• Radius

• Diameter

Find the circumference of the circle

• 18.84 cm

• 75.36 cm

• 37.68 cm

Find the circumference of the circle whose radius is 4 in

• 12.56 in

• 25.12 in

• 50.24 in