Area and Circumference and Find Radius and Diameter

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.

The radius of a circle is

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

• The measurement around the circle

• The measurement from and edge of the circle to another edge through the center

• A line perpendicular to the diameter of the circle

The diameter of a circle is:

• The measurement around the circle.

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

• The distance from the center of the circle to an edge of a circle

• The distance from an edge of a circle to another edge through the center. 

Find the diameter of a circle if its radius is 7.5 meters. (Type the answer including the units)

Find the diameter of a circle if its radius is 8.42 inches. (Type the answer including the units)

Name the part of the circle pointed by the arrow.

• Radius

• Diameter

• Circumference

• Arc

Find the radius of a circle if its diameter is 12.8 feet. (Type the answer including the units)

Find the radius of a circle if its diameter is 15.9 centimeters. (Type the answer including the units)