
Area of Circles
Flashcard
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the formula for finding the area of a circle?
Back
A = π·r²
2.
FLASHCARD QUESTION
Front
What is the area of a circle with a radius of 5 cm?
Back
A = π·(5)² = 78.54 cm²
3.
FLASHCARD QUESTION
Front
What is the radius of a circle?
Back
The radius is the distance from the center to any point on the circle.
4.
FLASHCARD QUESTION
Front
What is the diameter of a circle?
Back
The diameter is the distance across a circle through its center.
5.
FLASHCARD QUESTION
Front
If the radius of a circle is doubled, how does the area change?
Back
The area increases by a factor of four.
6.
FLASHCARD QUESTION
Front
What is π (pi)?
Back
π is a mathematical constant approximately equal to 3.14, representing the ratio of a circle's circumference to its diameter.
7.
FLASHCARD QUESTION
Front
How do you calculate the circumference of a circle?
Back
C = 2·π·r or C = π·d.
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