
Circumference Review
Flashcard
•
Mathematics
•
7th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the circumference of a circle?
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 7 cm, what is its circumference?
Back
C = 2π(7) ≈ 43.98 cm.
4.
FLASHCARD QUESTION
Front
What is the diameter of a circle with a radius of 5 cm?
Back
The diameter is 10 cm (d = 2r).
5.
FLASHCARD QUESTION
Front
If the circumference of a circle is 31.4 cm, what is its radius?
Back
r = C/(2π) ≈ 5 cm.
6.
FLASHCARD QUESTION
Front
What is the relationship between diameter and circumference?
Back
The circumference is π times the diameter (C = πd).
7.
FLASHCARD QUESTION
Front
If a circle has a circumference of 78.5 cm, what is its diameter?
Back
d = C/π ≈ 25 cm.
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