Area Circumference Circle Enrichment

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

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

• 44 inches squared

• 154 inches squared

• 616 inches squared

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

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

Match the following definitions to the terms:

• The distance around a circle

• Area of a circle

• feet, cm, inches

• Units of area

• How much space a circle takes up

• Units of circumference

• square units (units²)

• Circumference of a circle

Mark has a circlular fire pit with a diameter of 5 feet. Build a brick border around the pit. Find the area of pit. Complete the statements about Mark's circular pit. To build the border, Mark needs a minimum of feet​ (a)   The area of the pit, to the nearest square foot is ​ (b)  

• 16

• 20 sq ft

• 7

• 8

• 9

• 15

• 8 sq ft

• 79 sq ft

• 314 sq ft

Mark has a circlular fire pit with a diameter of 5 feet. Build a brick border around the pit. Find the area of pit. Complete the statements about Mark's circular pit. To build the border, Mark needs a minimum of feet​ (a)   The area of the pit, to the nearest square foot is ​ (b)  

• 16

• 20 sq ft

• 7

• 8

• 9

• 15

• 8 sq ft

• 79 sq ft

• 314 sq ft

Match the following

• circumference of a circle

• Area of a Circle

• Arc Length

• Sector Area

Mark has a circlular fire pit with a diameter of 5 feet. * Build a brick border around the pit. * Find the area of pit. Complete the statements about Mark's circular pit. To build the border, Mark needs a minimum of feet​ (a)   The area of the pit, to the nearest square foot is ​ (b)  

• 16

• 20 sq ft

• 7

• 8

• 9

• 15

• 8 sq ft

• 79 sq ft

• 314 sq ft

Match the formulas to the measurements indicated.

• To find the diameter of a circle use:

• 2r

• To find the circumference of a circle use:

• To find the area of a circle use:

• d/2

• To find the radius of the circle use: