Circles Review

What is the diameter of the circle?

• 8

• 16

• 32

• 64

What is the radius of the circle?

• 8

• 16

• 32

• 64

What formula would you use to find the area of a circle?

• 
  

  $2\pi r$

• $\pi d$

• $\pi r^2$

What is the closest area of this circle? (Type in the answer)

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What is the radius of this circle?

• 1.5

• 3

• 4.5

• 6

What is the diameter of this circle?

• 1.5

• 3

• 4.5

• 6

What is the closest area of this circle?

• 1.5

• 3

• 4.5

• 6.75

What formula would you use to find the circumference of this circle?

• $\pi r^2$

• $2\pi r$

• $\frac{\pi r^2}{2}$

What is the circumference of this circle?

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Anne and some friends ordered a pizza with a 13 centimeter radius. Anne and her friends ate the shaded portion. How much of the pizza did they eat?

• A whole pizza

• Half of the pizza

• A quarter of the pizza