Exploring the Area of a Circle Quiz

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

• It is a proportional relationship with a constant of 2.

• It is a proportional relationship with a constant of 1.

• It is not a proportional relationship.

• It is a proportional relationship with a constant of pi.

Which graph shows a non-proportional relationship?

• None of the above

• Diameter and radius

• Diameter and circumference

• Diameter and area

Why is the area of the circle in Problem 2A more than 2 square units but less than 4 square units?

• The circle is larger than both squares.

• The circle is smaller than both squares.

• The circle is the same size as the larger square.

• The circle is larger than the smaller square but smaller than the larger square.

In Problem 2B, what is the area of the larger square?

• 12 square units

• 24 square units

• 36 square units

• 18 square units

If Circle B's diameter is three times that of Circle A, how many times greater is Circle B's area compared to Circle A?

• 12 times

• 9 times

• 3 times

• 6 times

What is the circumference of Lynn's bike wheel if it travels 100 meters in 55 rotations?

• 2.0 meters

• 1.5 meters

• 2.5 meters

• 1.82 meters

What is the circumference of a circle with a diameter of 15 cm?

• 60 cm

• 30 cm

• 47 cm

• 15 cm

If Priia's circle has a circumference of 25 cm, what is the diameter of Claire's circle if it is three times larger?

• 15 cm

• 23.88 cm

• 7.96 cm

• 30 cm

What is the formula to find the circumference of a circle?

• Diameter times 2

• Radius times 2

• Diameter times pi

• Radius times pi

How do you calculate the diameter from the circumference?

• Multiply the circumference by pi

• Divide the circumference by pi

• Divide the circumference by 2

• Multiply the circumference by 2