Area and Circumference of a Circle

MUST DO: Elsie bought a circular rug that is 9 feet in diameter. What is the circumference of the rug rounded to the nearest tenth of a foot?

• 4.5 feet

• 14.1 feet

• 28.3 feet

• 56.5 feet

Tags

CCSS.7.G.B.4

MUST DO: What is the approximate area of the circle above?

• 44 inches squared

• 154 inches squared

• 616 inches squared

Tags

CCSS.7.G.B.4

MAY DO: A circular track with a diameter of 60 meters is shown. Shaleah walked around the track 4 times. Approximately how many meters did she walk?

• 377

• 2826

• 754

• 11,304

Tags

CCSS.7.G.B.4

ENRICHMENT: A farmer grows potatoes on a circular plot of land that has a radius of 20 meters. Each potato plant requires 2 square meters of soil. What is the maximum number of potato plants the farmer can grow?

• 80

• 628

• 1256

• 2512

Tags

CCSS.7.G.B.4

• 25.12 inches

• 12.56 inches

• 50.24 inches

• 31.4 inches

Tags

CCSS.7.G.B.4

Match the following definitions to the terms:

• Circumference of a circle

• How much space a circle takes up

• square units (units²)

• Units of circumference

• feet, cm, inches

• Area of a circle

• The distance around a circle

• Units of area

Tags

CCSS.7.G.B.4

The radius of a circle is 12 cm. What is the approximate circumference of the circle?

• 75 cm

• 38 cm

• 24 cm

Tags

CCSS.7.G.B.4

The diameter of a circle is 8 cm. What is the approximate area of the circle?

• 25 cm squared

• 50 cm squared

• 201 cm squared

Tags

CCSS.7.G.B.4

A flower pot has a circumference of 35 inches. What is the approximate length of the radius of the flower pot?

• 3.3 inches

• 5.6 inches

• 6.8 inches

• 11.1 inches

Tags

CCSS.7.G.B.4

Sadie has 38 inches of fringe to sew around a circular pillow. What is the approximate diameter of the largest pillow she can use?

• 6 inches

• 9 inches

• 10 inches

• 12 inches

Tags

CCSS.7.G.B.4