In this worksheet, we will practice identifying the circumference of a circle using the 2Οr formula to find the circumference of circular shapes in real life.

**Q2: **

Given that the diameter of a flower is 10 centimetres, use a calculator to determine the circumference of the flower, taking for .

- A cm
- B cm
- C cm
- D cm
- E cm

**Q4: **

There are two circular paths to walk on a local hiking trail. Given that one path has a diameter of 168 yards, and the other path has a radius of 50 yards, find, to the nearest tenth, how much farther a person can walk on the longer path.

**Q5: **

The Noah family has a circular swimming pool with a radius of 25 feet. They built a 6-foot-wide deck around the entire pool. What is the circumference of the deck, rounded to the nearest tenth?

**Q6: **

What distance does a 14 cm diameter wheel cover after 90 turns? Use to approximate .

**Q7: **

Each wheel on Amiraβs car has a diameter of 18 inches. Which expression could be used to find the circumference of the wheel?

- A
- B
- C
- D
- E

**Q8: **

The tire on Liamβs bike has a radius of 30 inches. Which of the following equations gives the circumference of the tire in inches?

- A
- B
- C
- D
- E

**Q9: **

Mr. Fady is putting up a fence around his circular backyard of diameter 8 feet. Determine, to the nearest tenth, how long the fence should be.

**Q10: **

A factory is producing plates with a diameter of 10 inches. They plan on putting a silver edge on each plate. Determine, to the nearest tenth, how much silver edging is needed for each plate by finding the circumference of each plate.

**Q12: **

A circular road has a diameter of miles. Determine, to the nearest tenth, the distance a car will cover if it goes around the road once.

**Q13: **

A dime has a radius of . Find the circumference of a dime to the nearest tenth.

**Q14: **

Bassem is walking on a circular path whose diameter is 4 miles. If Bassem walks about 3 miles an hour, find how many hours it will take him to complete the path, rounded to the nearest hour.

**Q15: **

A piece of wire is bent to form the shape shown in the figure. Using 3.14 in place of , how long is the wire?

- A 67 cm
- B 105.19 cm
- C 277.38 cm
- D 172.19 cm

**Q16: **

A row of lamps is placed along the outer edge of a circular chandelier of radius feet. Determine the length of the row of lamps to the nearest tenth.

**Q17: **

A wire fence surrounds a circular garden. If the area of the garden is 154 and the fence cost 19 pounds per metre, how much is the fence? (Use to approximate .)

**Q21: **

What distance does a 40 cm diameter wheel cover after 100 turns? Use 3.14 to approximate .

**Q22: **

A factory is producing plates with a diameter of 12 inches. They plan on putting a silver edge on each plate. Determine, to the nearest tenth, how much silver edging is needed for each plate by finding the circumference of each plate.

**Q23: **

The Ethan family has a circular swimming pool with a radius of 25 feet. They built a 5-foot-wide deck around the entire pool. What is the circumference of the deck, rounded to the nearest tenth?

**Q24: **

There are two circular paths to walk on a local hiking trail. Given that one path has a diameter of 348 yards, and the other path has a radius of 96 yards, find, to the nearest tenth, how much farther a person can walk on the longer path.

**Q25: **

A circular road has a diameter of miles. Determine, to the nearest tenth, the distance a car will cover if it goes around the road once.