Circumference and Area

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 (use 3.14 for pi)?

• 11.32 ft
• 12.25 ft
• 10.99 ft
• 8.75 ft

Ms. Merine calculated that her hoop earring has a diameter of 3.5 centimeters. What is the area of her earring (round to the hundreth's place)?

• 9.25 cm²
• 9.62 cm²
• 9.15 cm²
• 9.99 cm²

The stained glass window is a semicircle. What is the distance around the window?

• 40.82 inches

• 66.82 inches

• 81.64 inches

• 107.64 inches

find the area of the circle below.

• 100 cm
• 225 cm
• 9 cm
• 28.26 cm

A circular swimming pool is 21 feet in diameter.

About how many feet around is the pool?

• 11 ft

• 42 ft

• 66 ft

• 132 ft

The Jones family wants to enclose their circular garden with a fence. To the nearest foot, what is the minimum length of fencing they need to buy?

• 196 ft

• 246 ft

• 392 ft

• 393 ft

If the word problem is asking you to find the space inside the circle, which formula should you use?

• r = d/2

• d = 2r

• C = πd

• A = πr²

If the problem ask you to find the distance around a circle, which formula should you use?

• r = d/2
• d = 2r
• C = πd
• A = πr²

Which formula would you use to answer: Lauren's bicycle tire has a diameter of 20 inches. How many inches is one full revolution of the wheel?

The circumference of a circle is

• The measurement from an edge of a circle to another edge.
• The measurement around the circle
• The measurement from an edge of a circle to another edge going through the center
• The measurement from the center of the circle to an edge of the circle