7.GR.B.3: Apply the formulas for the area and circumference of a circle to solve problems in context. Use informal reasoning and visual models to explain the relationship between the circumference and area of a circle.

Apply the formulas for the area and circumference of a circle to solve problems in context. Use informal reasoning and visual models to explain the relationship between the circumference and area of a circle.

Example Problems

A volleyball has a radius of

4 \text{ inches}

.
What is the diameter of the volleyball?

A frisbee has a radius of

12 \text{ centimeters}

.
What is the diameter of the frisbee?

A basketball hoop's rim has a diameter of

\text{18 inches}

.
What is the radius of the rim?

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