Topic 1 & 2 Test Correction

What is the relationship between the diameter and radius of a circle?

• Diameter is half the radius

• Radius is half the diameter

• Diameter is equal to the radius

• Radius is equal to the diameter

What is the formula for finding the radius of a circle given the diameter?

• Radius = Diameter / 2

• Radius = Diameter * 2

• Radius = Diameter + 2

• Radius = Diameter - 2

What is the formula for finding the diameter of a circle given the radius?

• Diameter = Radius / 2

• Diameter = Radius * 2

• Diameter = Radius + 2

• Diameter = Radius - 2

What is the value of pi?

• 3.14

• 2.71

• 1.618

• 0.577

What is the area of a circle with a radius of 9 centimeters? Leave your answer in terms of π.

• 9π square centimetersπ

• 18π square centimeters

• 81π square centimeters

• 162π square centimeters

What is the approximate area of a circle with a radius of 9 centimeters using the value of pi as 3.14?

• 9 square centimeters

• 18 square centimeters

• 81 square centimeters

• 254.34 square centimeters

What is the area of a circle with a diameter of 12 feet? Leave your answer in terms of π.

• 12π square feet

• 24π square feet

• 36π square feet

• 72π square feet

What is the approximate area of a circle with a diameter of 12 feet using the value of pi as 3.14?

• 12 square feet

• 24 square feet

• 36 square feet

• 113.04 square feet

Lorenzo can read 12 pages of his book in 3 minutes. Use the table to determine the unit rate.

Perry is delivering newspapers. In 2 hours he delivers 60 newspapers. Use the table to determine the unit rate.