Circles and Spheres

Find the area of the circle in terms of π. SELECT ALL THAT APPLY.

• 81π cm²

• 254.5 cm²

• 9π cm²

• 28.3 cm²

Kayla has two spherical balls in her yard (see picture).Which statement about their volumes is true?

• The volume of Ball 2 is twice the volume of Ball 1.

• The volume of Ball 1 is 8 times the volume of Ball 2.

• The volume of Ball 1 is twice the volume of Ball 2.

• The volume of Ball 2 is 8 times the volume of Ball 1.

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04

What is the equation of the circle shown in the graph?

Mathematical Equivalence

ON

Jayne has a very large circular lollipop that has a circumference of 25.12 inches. What would the diameter of Jayne’s lollipop be? Use π = 3.14.

• 4 in.

• 8 in.

• 12 in.

• 16 in.

A table tennis ball has a diameter of 40 mm. What is the approximate volume of the table tennis ball in cubic millimeters?

• 1,676 mm³

• 18,850 mm³

• 33,510.3 mm³

• 268,083 mm³

Campbell Soup is creating a new soup label. If a can has a height of 6 in and a diameter of 4 in, how much material does Campbell need for each soup label? Use 3.14 for π.

What is the surface area of the label?

• 150.72 in²

• 100.48 in²

• 24 in²

• 75.36 in²

What is this formula used to find?
A=πr²

• The volume of a cylinder

• The volume of a cone

• The volume of a sphere

• The area of a circle

The circumference is 62.8 inches.  What is the radius?

• 20 inches

• 10 inches

• 6.28 inches

• 31.4 inches

The Ferris wheel at the State Fair of Texas is 450 feet across.  How many feet would a person travel if they rode around the Ferris wheel 6 times?

• 1,413 feet

• 2,826 feet

• 8,478 feet

• 4,239 feet