Grade 7 | Unit 3 | Lesson 3: Exploring Circumference | Practice Problems

Diego measured the diameter and circumference of several circular objects and recorded his measurements in the table.

One of his measurements is inaccurate. Which measurement is it? Explain how you know.

Object	Diameter (cm)	Circumference (cm)
Half Dollar Coin	3	10
Flying Disc	23	28
Jar Lid	8	25
Flower Pot	15	48

• The measurement for the half dollar coin is very inaccurate.

• The measurement for the flying disc is very inaccurate.

• The measurement for the jar lid is very inaccurate.

• The measurement for the flower pot is very inaccurate.

Tags

CCSS.2.MD.A.2

Tags

CCSS.7.G.B.4

• The radius is 7.5 cm.

• The radius is 15 cm.

• The radius is 10 cm.

• The radius is 12 cm.

Name a segment that is a diameter. How long is it?

• The diameter is 7.5 cm.

• The diameter is 15 cm.

• The diameter is 10 cm.

• The diameter is 12 cm.

Tags

CCSS.8.EE.B.5