Circles - Area and Circumference

Multiple Choice

What does the red speedometer line represent?

• pi

• radius

• diameter

Multiple Choice

What is the area of this circle?

• 201.06 square meters

• 
  123.12 square meters

• 50.24 square meters

• 25.12 square meters

Multiple Choice

What is the area of this circle?

• 
  62.59 cm²

• 18.84 cm²

• 113.1 cm²

• 28.26 cm²

Multiple Choice

A lime has a diameter of 16 mm. What is the area?

• 
  26.69 mm²

• 
  72.25 mm²

• 226.87 mm²

• 53.38 mm²

Multiple Choice

The radius of a circle is _______ the diameter.

• 
  half

• 
  triple

• twice

• double

Multiple Choice

What is the circumference of this pie if the diameter is 120 inches?

• 310.14 m

• 240.00 m

• 376.80 m

• 684.00 m

Multiple Choice

Which of the following measurements is the best approximation of the circumference of the trampoline if the radius is 12 feet?

• 72 inches

• 36 inches

• 288 inches

• 432 inches

Multiple Choice

The diameter of circle A is 15 inches. The diameter of circle B is 20 inches.

Which measurement is closest to the difference of the circumference of circle A and the circumference of circle B.

• 31.4

• 137

• 7.85

• 15.7

Multiple Choice

A cruise ship has a large, circular window. It has a radius of 9 meters. What is the window's circumference?

• The circumference is 27 meters.

• The circumference is 54 meters.

• The circumference is 243 meters.

• The circumference is 432 meters.

Multiple Choice

A circular swimming pool is 21 feet in diameter.

How many square feet is the circumference of the pool?

• 65.94 ft²

• 
  693 ft²

• 346.2 ft²

• 466.2 ft²

Multiple Choice

What is the distance around the circle called?

• Circumference

• Diameter

• Area

• Radius

Multiple Select

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

There are two correct answers.

• 
  A = π·r²

• 
  C = r²

• C = rd

• C = πd

• C = 2πr

Multiple Choice

What number represents pi (π)?

• 31.4

• 3.14

• 43.1

• 34.1

Multiple Choice

If the radius of a circle is 12.5 meters, the diameter is ____.

• 
  6.25 meters

• 25 meters

• 125 meters

• 50 meters

Multiple Choice

What is the student measuring?

• the diameter of the frisbee

• the radius of the frisbee

• the area of the frisbee

• the circumference of the frisbee