What is the formula to find the circumference of a circle?
Finding Circumference

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•
Mathematics
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Circumference = 2 × π × radius or Circumference = π × diameter.
2.
FLASHCARD QUESTION
Front
What is the value of π (pi) approximately?
Back
π (pi) is approximately 3.14.
3.
FLASHCARD QUESTION
Front
If a circle has a diameter of 10 cm, what is its circumference?
Back
Circumference = π × diameter = 3.14 × 10 = 31.4 cm.
4.
FLASHCARD QUESTION
Front
What is the circumference of a circle with a radius of 5 cm?
Back
Circumference = 2 × π × radius = 2 × 3.14 × 5 = 31.4 cm.
5.
FLASHCARD QUESTION
Front
What does circumference measure?
Back
Circumference measures the distance around a circle.
6.
FLASHCARD QUESTION
Front
If the radius of a circle is doubled, how does the circumference change?
Back
The circumference also doubles.
7.
FLASHCARD QUESTION
Front
What is the circumference of a circle with a radius of 3 m?
Back
Circumference = 2 × π × 3 = 18.84 m.
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