Measuring Circles

What is the area of this circle?

• 6082.12

• 1519.76

• 1893.14

• 1292.92

Find the circumference of a circle with a radius of 13.5 mm.

• 37.68mm

• 18.84mm

• 84.78 mm

• none of the above

If the diameter of a circle is 4, what is the radius?

• 4

• 2π

• 4π

• 2

The circumference is 62.8 inches.  What is the radius?

• 20 inches

• 10 inches

• 6.28 inches

• 31.4 inches

A circular table top has an area of 324 square inches. Which measurement is closest to the radius of the table top in inches?

• 10.2

• 18.0

• 56.5

• 103.1

What is the diameter of a circle with an area of 380.13 ft²?

• 11 ft

• 12 ft

• 22 ft

• 69.12 ft

The most popular size pizza at Pizza Parlor is a large pizza with a 12-inch radius. Which of the following best represents the circumference of this pizza? (7.9B) Hint: C = 2πr

• 62.8 inches

• 60 inches

• 75.4 inches

• 37.7 inches

Randy’s circular garden has a radius of 1.5 feet. He wants to enclose the garden edging that costs $0.75 per foot. About how much will the edging cost? Use 3.14 for π!

• $9.42

• $7.07

• $3.53

• $4.71