Basic Circles Area and Circumference

Steven purchases a bowl. The diameter of the

bowl is 14 cm. What is the circumference of the

bowl? Use 3.14 for π

• 28 cm

• 43.96 cm

• 87.96 cm

• 7 cm

Cynthia wants to buy a round photo frame for her brother. The radius of the photo frame is 9 cm. What is the photo frame’s circumference? Keep your answer in terms of π

• 9π cm

• 4.5π cm

• 81π cm

• 18π cm

Daniel wants to buy cookies for her friend. The radius of a cookie is 5 inches. What is the cookie’s circumference? Use 3.14 for π

• 10 in

• 2.5 in

• 15.7 in

• 31.4 in

A circular swimming pool is 21 feet in diameter.

How many feet around is the pool? Use ²²⁄₇ for π

• 10.5 ft

• 42 ft

• 66 ft

• 131.95 ft

Match the following definitions to the terms:

• The distance around a circle

• Area of a circle

• How much space a circle takes up

• square units (units²)

• Units of circumference

• feet, cm, inches

• Circumference of a circle

• Units of 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 radius of the circle use:

• To find the area of a circle use:

• 2r

• To find the circumference of a circle use:

• d/2

• To find the diameter of a circle use:

Match the following

• Area of a Circle

• Sector Area

• circumference of a circle

• Arc Length

The circumference of a circle is 28.26 cm. What is closest to the area of the circle.

• 254.34 cm²

• 14.13 cm²

• 63.6 cm²

The circumference of a circle is

• The measurement from an edge of a circle to another edge.

• The measurement around the circle

• The measurement from an edge of a circle to another edge going through the center

• The measurement from the center of the circle to an edge of the circle