Grade 7 | Unit 3 | Lesson 10: Distinguishing Circumference and Area | Practice Problems

For each problem, decide whether the circumference of the circle or the area of the circle is most useful for finding a solution. Explain your reasoning. A car’s wheels spin at 1000 revolutions per minute. The diameter of the wheels is 23 inches. You want to know how fast the car is travelling.

• Circumference

• Area

For each problem, decide whether the circumference of the circle or the area of the circle is most useful for finding a solution. Explain your reasoning. A circular kitchen table has a diameter of 60 inches. You want to know how much fabric is needed to cover the table top.

• Circumference

• Area

For each problem, decide whether the circumference of the circle or the area of the circle is most useful for finding a solution. Explain your reasoning. A circular puzzle is 20 inches in diameter. All of the pieces are about the same size. You want to know about how many pieces there are in the puzzle.

• Circumference

• Area

For each problem, decide whether the circumference of the circle or the area of the circle is most useful for finding a solution. Explain your reasoning. You want to know about how long it takes to walk around a circular pond.

• Circumference

• Area

The city of Paris, France is completely contained within an almost circular road that goes around the edge. Use the map with its scale to estimate the circumference of Paris.

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The city of Paris, France is completely contained within an almost circular road that goes around the edge. Use the map with its scale to estimate the area of Paris.

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Here is a diagram of a softball field: About how long is the fence around the field?

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Here is a diagram of a softball field: About how big is the outfield?

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