Circles Review

What is the length around a circle called?

• the radius

• the diameter

• the circumference

What is a segment with its endpoints on the circle that passes through the center called?

• the radius

• the diameter

• the circumference

Harper, Scarlett, and Hannah are planning a picnic and they want to bring a circular blanket to sit on. If the blanket has a radius of 5 units, what would be the circumference of the blanket? (Use π = 3.14)

• 10 units

• 31.4 units

• 25 units

• 15.7 units

Evelyn, Michael, and Henry are planning to build a circular garden in their backyard. If they decide to make the garden with a diameter of 10 cm, what would be the area of the garden? (Use π = 3.14)

• 50.3 cm²

• 78.5 cm²

• 31.4 cm²

• 15.7 cm²

What is the area of the circle?

• 15.7 cm²

• 78.5 cm²

• 31.4 cm²

• 5 cm²

• A

• B

• C

• D

Name the line show.

• Secant

• Diameter

• Radius

• Chord

Sally tried to solve for the area of circle. Her work is shown. What mistake did Sally make.

• Sally squared π incorrectly.

• Sally multiplied the π and radius incorrectly.

• Sally used diameter instead of the radius.

• No mistake. Sally solved the problem correctly.

Circle M has a radius of 7.0 cm. The shortest distance between P and Q on the circle is 7.3 cm. What is the approximate area of the shaded portion of circle M? (See image.)

• 153.9 squared cm.

• 44 squared cm.

• 25.6 squared cm.

• 21 squared cm.

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04