
Area and Circumference of Circles
Flashcard
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
Standards-aligned
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the definition of a radius in a circle?
Back
The radius is the distance from the center of the circle to any point on its circumference.
2.
FLASHCARD QUESTION
Front
What is the definition of a diameter in a circle?
Back
The diameter is the distance across the circle through its center, equal to twice the radius.
Tags
CCSS.HSG.C.A.2
3.
FLASHCARD QUESTION
Front
What is the formula for the circumference of a circle?
Back
C = πd or C = 2πr, where d is the diameter and r is the radius.
Tags
CCSS.7.G.B.4
4.
FLASHCARD QUESTION
Front
What is the formula for the area of a circle?
Back
A = πr², where r is the radius.
Tags
CCSS.7.G.B.4
5.
FLASHCARD QUESTION
Front
If a circle has a radius of 7 cm, what is its diameter?
Back
The diameter is 14 cm (d = 2r).
Tags
CCSS.7.G.B.4
6.
FLASHCARD QUESTION
Front
If a circle has a diameter of 20 cm, what is its circumference?
Back
The circumference is 62.83 cm (C = πd = π × 20).
Tags
CCSS.7.G.B.4
7.
FLASHCARD QUESTION
Front
If a circle has a radius of 3 inches, what is its area?
Back
The area is 28.27 in² (A = πr² = π × 3²).
Tags
CCSS.7.G.B.4
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