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In this lesson, we will learn how to identify the circumference of a circle using the 2ฯr formula to find the circumference of circular shapes in real life.

Q1:

Find the circumference of a circular pizza with a diameter of 33 inches. Round to the nearest tenth

Q2:

Find the circumference of a circular pizza with a diameter of 12 inches. Round to the nearest tenth

Q3:

A cylinder-shaped jar of jam has a circular base of radius 7. Use 2 2 7 as an approximation of ๐ to calculate the perimeter of the base.

Q4:

A cylinder-shaped jar of jam has a circular base of radius 10. Use 3.14 as an approximation of ๐ to calculate the perimeter of the base.

Q5:

A dime has a radius of 8 1 2 m i l l i m e t e r s . Find the circumference of a dime to the nearest tenth.

Q6:

Mr John has a circular garden with a diameter of 107 feet surrounded by fencing. Using the same length of fencing, he is going to create a square garden. What is the maximum side length of the square? Round the result to one decimal place.

Q7:

Mr Hussein has a circular garden with a diameter of 67.9 feet surrounded by fencing. Using the same length of fencing, he is going to create a square garden. What is the maximum side length of the square? Round the result to one decimal place.

Q8:

What distance does a 14 cm diameter wheel cover after 90 turns? Use 2 2 7 to approximate ๐ .

Q9:

What distance does a 25 cm diameter wheel cover after 90 turns? Use 3.14 to approximate ๐ .

Q10:

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

Q11:

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.

Q12:

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.

Q13:

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.

Q14:

The Adel 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?

Q15:

The Sherif family has a circular swimming pool with a radius of 11 feet. They built a 5-foot-wide deck around the entire pool. What is the circumference of the deck, rounded to the nearest tenth?

Q16:

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.

Q17:

There are two circular paths to walk on a local hiking trail. Given that one path has a diameter of 140 yards, and the other path has a radius of 66 yards, find, to the nearest tenth, how much farther a person can walk on the longer path.

Q18:

A circular road has a diameter of 3 5 miles. Determine, to the nearest tenth, the distance a car will cover if it goes around the road once.

Q19:

A circular road has a diameter of 3 4 miles. Determine, to the nearest tenth, the distance a car will cover if it goes around the road once.

Q20:

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

Q21:

Given that the diameter of a flower is 14 centimetres, use a calculator to determine the circumference of the flower, taking for .

Q22:

Given that the diameter of a flower is 11 centimetres, use a calculator to determine the circumference of the flower, taking for .

Q23:

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

Q24:

The tyre on Adelโs bike has a radius of 18 inches. Which of the following equations gives the circumference of the tyre in inches?

Q25:

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.

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