What is the circumference of a circle?
Circumference of Circles

Flashcard
•
Mathematics
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The distance around a circle.
2.
FLASHCARD QUESTION
Front
What is the formula to calculate the circumference of a circle?
Back
C = 2πr or C = πd, where r is the radius and d is the diameter.
3.
FLASHCARD QUESTION
Front
If the radius of a circle is 10 cm, what is its circumference?
Back
62.8 cm (C = 2πr = 2 * 3.14 * 10).
4.
FLASHCARD QUESTION
Front
What is the relationship between diameter and radius?
Back
The diameter is twice the radius (d = 2r).
5.
FLASHCARD QUESTION
Front
If the diameter of a circle is 20 inches, what is the radius?
Back
10 inches (r = d/2).
6.
FLASHCARD QUESTION
Front
What is the circumference of a circle with a radius of 33 ft?
Back
207.2 ft (C = 2πr = 2 * 3.14 * 33).
7.
FLASHCARD QUESTION
Front
What is the circumference of a circle with a diameter of 24 cm?
Back
75.36 cm (C = πd = 3.14 * 24).
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