What is the formula to calculate the circumference of a circle?
Real World Area and Circumference Flashcard

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Mathematics
•
6th - 8th Grade
•
Hard
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16 questions
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1.
FLASHCARD QUESTION
Front
Back
Circumference = π × diameter or Circumference = 2 × π × radius.
2.
FLASHCARD QUESTION
Front
If a circle has a diameter of 10 cm, what is its circumference?
Back
Circumference = π × 10 cm ≈ 31.42 cm.
3.
FLASHCARD QUESTION
Front
What is the relationship between diameter and radius?
Back
The radius is half of the diameter. Radius = diameter / 2.
4.
FLASHCARD QUESTION
Front
How do you calculate the area of a circle?
Back
Area = π × radius².
5.
FLASHCARD QUESTION
Front
If the radius of a circle is 5 m, what is its area?
Back
Area = π × (5 m)² ≈ 78.54 m².
6.
FLASHCARD QUESTION
Front
What is the formula for the perimeter of a rectangle?
Back
Perimeter = 2 × (length + breadth).
7.
FLASHCARD QUESTION
Front
If a rectangle has a length of 8 m and a breadth of 3 m, what is its perimeter?
Back
Perimeter = 2 × (8 m + 3 m) = 22 m.
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