Circumference to Area Problems

Jesse used rope to stake a circular region in which to plant a garden. The diameter of the region is 20 inches. What is the approximate area of half of the garden? Round to the nearest hundredth. Don't forget to label - square inches or sq in

• 50.24  yd

• 25.12 yd

• 38.92  yd

• 12.56 yd

Caedyen has trained his puppy, Chase, to jump through a ring. According to Caedyen's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference rounded to the nearest whole number (use 3.14 for pi)?

• 10 ft

• 12 ft

• 11 ft

• 21 ft

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?

A pizza has a diameter of 50 centimeters. Which of the following is closest to the circumference of the pizza? Show your work.

• 157 cm

• 53.14 cm

• 150 cm

• 201.28 cm

The diameter of a circular path is 30 meters. Using =3.14, find the approximate circumference of the path. Show your work.

• 33.14 m

• 150.72 m

• 94.2 m

• 63.14 m

The radius of a circular rug is 3 feet. Which of the following is closest to the circumference of the rug? Show your work.

• 6.14 ft

• 18.84 ft

• 9.42 ft

• 51.96 ft

Students in England created the world’s largest yo-yo. Its diameter is about 10 feet long! Which of these is closest to the area of the yo-yo? Show your work.

• 80.5 in²

• 87.5 in²

• 314 in²

• 78.5 in²