Entry Task Review Area and Circumference of a Circle

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?

• 62.84 inches

• 60 inches

• 75.36 inches

• 452.16 inches

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 28.26 m²

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference?

• 11.32 ft

• 12.25 ft

• 10.99 ft

• 8.75 ft

What is the area of this circle?

• 163.24 cm²

• 15.32 cm²

• 124.24 cm²

• 113.04 cm²

Find the area of the circle in terms of π

find the area of the circle with radius 3 cm below.

• 100 cm²

• 225 cm²

• 9 cm²

• 28.26 cm²

Match the formulas to the measurements indicated.

• To find the diameter of a circle use:

• 2r

• To find the area of a circle use:

• To find the circumference of a circle use:

• d/2

• To find the radius of the circle use:

Find the area of a circle with a diameter of 12 cm.

• 36π cm²

• 113.04 cm²

• 144π cm²

• 452.16 cm²