Circumference and Area of Circles Quiz

For a given circle, which ratio describes the value of π ?

• The radius of the circle : the circumference of the circle

• The diameter of the circle : the circumference of the circle

• The circumference of the circle : the radius of the circle

• The circumference of the circle : the diameter of the circle

Evie measured the circumference of a circle. Which steps can she follow to find the area of a circle?

The figure shows how the formula for the circumference of a circle may be used to derive the formula for the AREA of a circle. Based on the figure, which of the following represents the area of a circle?

Steven wants to tie a piece of string around a pole with a diameter 98 millimeters. Which of the following is the BEST approximation of the minimum amount of string Steven will need so that the opposite ends will meet and can be tied to form a circle?

• 640 mm

• 320 mm

• 160 mm

• 30 mm

The diameter of a circle is 0.82 inches. The approximate area of the circle is ______square inches.

The upper edge of a bowl has a diameter of 3.5 inches. Which measure is closest to the circumference of the bowl's upper edge?

• 5.5 inches

• 11.0 inches

• 22.0 inches

• 38.5 inches

A crop circle in a corn field has a radius of 30 feet. Which equation represents the area of the crop circle in square feet?

Sharon has a hula hoop with a circumference of 88 inches. What is the approximate diameter, to the nearest inch, of her hula hoop? Use 3.14 for π.

• 14 inches

• 28 inches

• 85 inches

• 276 inches

One of the largest pizzas ever made had a diameter of 80 yards. What was the area of the pizza? Use 3.14 for π. Round your answer to the nearest square yard.

Look at the circle below. What is the area of the circle if the diameter is 6 centimeters. Use 3.14 for pi.

• 18.84 square centimeters

• 28.26 square centimeters

• 37.68 square centimeters

• 113.04 square centimeters