C = 2πr: Challenge & Extension
Mathematics
Grade 7
11 questions
~22 mins
1 views0 downloads
About This Worksheet
A worksheet focusing on calculating and understanding the circumference of circles using the formula C = 2πr, including practice, problem solving, real-world applications, and extension questions.
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C = 2πr: Challenge & Extension
Subject: MathematicsGrade: Grade 7
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Untitled Worksheet
Grade Grade 7
A
Practice Questions
Answer all questions. Show your working in the grid spaces provided.
1.
Calculate the circumference of a circle with a radius of 5 cm.
[2 marks]2.
A circle has a diameter of 14 meters. Find its circumference.
[3 marks]3.
If the circumference of a circle is 50 meters, what is its radius? (Use π ≈ 3.14)
[3 marks]4.
Construct a circle with a radius of 8 cm on the grid. Then, calculate its circumference.
[3 marks]5.
A bicycle wheel has a radius of 35 cm. Calculate the distance traveled in one full rotation.
[2 marks]6.
A circular garden has a circumference of 62.8 meters. Find its radius.
[3 marks]7.
Explain why using an incorrect value of π, such as 3.14 instead of 3.1416, can lead to errors in calculating the circumference.
[4 marks]8.
A circular track has a circumference of 400 meters. What is its radius? (Use π ≈ 3.14)
[3 marks]9.
A round table has a circumference of 94.2 inches. If the table’s radius is doubled, what is the new circumference?
[3 marks]10.
Identify and correct the mistake in this calculation: A circle with radius 10 cm has a circumference of 50 cm.
[4 marks]11.
Plot the graph of y=2x on the grid. Using this, find the circumference of a circle with radius 7 cm, given the formula C=2πr.
[4 marks]Quick Actions
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Details
- Created
- 1/1/2026
- Updated
- 1/1/2026
- Type
- worksheet