𝜋 Day Circles Review

• 15.7 cm

• 31.4 cm

• 78.5 cm

• 25 cm

If the diameter of a circle is 10 inches, what is the radius?

• 5 inches

• 10 inches

• 15 inches

• 20 inches

• 10 meters

• 20 meters

• 30 meters

• 40 meters

What is the area of a circle with a diameter of 14 cm?

• 14𝜋 cm²

• 7𝜋 cm²

• 49𝜋 cm²

• 196𝜋 cm²

Which of the following statements is true about the relationship between the radius and diameter of a circle?

• The radius is twice the diameter.

• The diameter is twice the radius.

• The radius and diameter are equal.

• The diameter is half the radius.

• 154 cm²

• 44 cm²

• 22 cm²

• 77 cm²

• 5 meters

• 10 meters

• 15 meters

• 20 meters

• 314 ft²

• 628 ft²

• 157 ft²

• 400 ft²

The diameter of a circle has a length of 6 inches.

Which of the following statements about the circle are true?

• The radius of the circle has a length of 3 inches.

• The radius of the circle has a length of 12 inches.

• The area of the circle is 6𝜋 square inches.

• The area of the circle is 9𝜋 square inches.

• The area of the circle is 36𝜋 square inches.

A large sprinkler is watering a circular area of 1600𝜋 sqaure meters. What is the radius, in meters, of the circular area being wtered by the sprinkler?