
Area and Circumference of Circles
Flashcard
•
Mathematics
•
7th Grade
•
Practice Problem
•
Medium
Wayground Content
Used 1+ times
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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.
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.
3.
FLASHCARD QUESTION
Front
What is the relationship between diameter and radius?
Back
The diameter (d) of a circle is twice the radius: d = 2r.
4.
FLASHCARD QUESTION
Front
If the radius of a circle is 10 cm, what is the diameter?
Back
The diameter is 20 cm.
5.
FLASHCARD QUESTION
Front
If the diameter of a circle is 14 inches, what is the radius?
Back
The radius is 7 inches.
6.
FLASHCARD QUESTION
Front
What is the circumference of a circle with a radius of 5 cm?
Back
The circumference is 31.4 cm (C = 2π(5)).
7.
FLASHCARD QUESTION
Front
What is the area of a circle with a radius of 3 m?
Back
The area is approximately 28.27 m² (A = π(3)²).
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