
Circumference and Area of a Circle
Flashcard
•
Mathematics
•
5th - 8th Grade
•
Practice Problem
•
Easy
+1
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the formula for the circumference of a circle?
Back
The circumference (C) of a circle is calculated using the formula C = 2πr, where r is the radius of the circle.
Tags
CCSS.7.G.B.4
2.
FLASHCARD QUESTION
Front
What is the formula for the area of a circle?
Back
The area (A) of a circle is calculated using the formula A = πr², where r is the radius of the circle.
Tags
CCSS.7.G.B.4
3.
FLASHCARD QUESTION
Front
If the radius of a circle is 5 m, what is its circumference?
Back
Using the formula C = 2πr, the circumference is C = 2π(5) ≈ 31.42 m.
Tags
CCSS.7.G.B.4
4.
FLASHCARD QUESTION
Front
If the radius of a circle is 10 in, what is its area?
Back
Using the formula A = πr², the area is A = π(10)² ≈ 314.16 in².
Tags
CCSS.7.G.B.4
5.
FLASHCARD QUESTION
Front
What is the relationship between diameter and radius in a circle?
Back
The diameter (d) of a circle is twice the radius (r), so d = 2r.
Tags
CCSS.7.G.B.4
6.
FLASHCARD QUESTION
Front
How do you convert the circumference from meters to yards?
Back
To convert meters to yards, multiply the length in meters by 1.09361.
Tags
CCSS.2.MD.A.2
7.
FLASHCARD QUESTION
Front
What is the circumference of a circle with a diameter of 8 m?
Back
Using the formula C = πd, the circumference is C = π(8) ≈ 25.13 m.
Tags
CCSS.7.G.B.4
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