Lesson 08: Relating Area to Circumference | Unit 3: Measuring Circles

Presentation

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Mathematics

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7th Grade

•

Hard

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CCSS

6.NS.B.3, 7.G.B.4, 4.MD.A.2

Standards-aligned

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29 Slides • 10 Questions

Open Ended

The picture shows a circle divided into 8 equal wedges, which are rearranged. The radius of the circle is $r$ , and its circumference is $2\pi r$ . How does the picture help to explain why the area of the circle is $\pi r^2$ ?

Type response here

Multiple Choice

A paper plate has a radius of 4.5 inches. What is the area of the plate?

78.540 square inches

28.274 square inches

50.265 square inches

63.617 square inches

Multiple Choice

Jada paints a circular table that has a diameter of 37 inches. What is the area of the table?

850.25 square inches

1200.00 square inches

1077.57 square inches

900.50 square inches

Multiple Choice

A circle’s circumference is approximately 76 cm. What is the estimated radius of the circle?

10 cm

15 cm

12.1 cm

20 cm

Multiple Choice

A circle’s circumference is approximately 76 cm. What is the estimated diameter of the circle?

22 cm

24.2 cm

30 cm

20 cm

Multiple Choice

A circle’s circumference is approximately 76 cm. Estimate the area of the circle.

Approximately 200 cm²

Approximately 300 cm²

Approximately 459.5 cm²

Approximately 600 cm²

Multiple Choice

Andre has a goal to exercise for 60 minutes this week. How many minutes has he exercised by Monday if he has completed 10% of his goal?

6 minutes

10 minutes

12 minutes

15 minutes

Multiple Choice

Andre has a goal to exercise for 60 minutes this week. How many minutes has he exercised by Wednesday if he has completed 60% of his goal?

30 minutes

36 minutes

40 minutes

45 minutes

Multiple Choice

Andre has a goal to exercise for 60 minutes this week. How many minutes has he exercised by Saturday if he has completed 130% of his goal?

60 minutes

70 minutes

78 minutes

80 minutes

Multiple Choice

The face of a clock has a circumference of 63 in. What is the area of the face of the clock?

314.16 in²

250.50 in²

200.00 in²

150.78 in²

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