
Area of a Circle
Flashcard
•
Mathematics
•
6th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the definition of a diameter in a circle?
Back
A diameter is a line that goes from one end of the circle to the other and crosses the center point.
2.
FLASHCARD QUESTION
Front
What is the difference between a radius and a diameter?
Back
A radius is half the length of a diameter; it is the distance from the center of the circle to any point on its circumference.
3.
FLASHCARD QUESTION
Front
If the radius of a circle is 9, what is the diameter?
Back
The diameter is 18, calculated as diameter = 2 * radius.
4.
FLASHCARD QUESTION
Front
What is the formula for calculating the area of a circle?
Back
The area of a circle is calculated using the formula A = πr², where r is the radius.
5.
FLASHCARD QUESTION
Front
If the radius of a circle is 9, what is the area?
Back
The area is approximately 254.47 m², calculated as A = π(9)².
6.
FLASHCARD QUESTION
Front
What is the area of a circle with a radius of 5?
Back
The area is approximately 78.54 m², calculated as A = π(5)².
7.
FLASHCARD QUESTION
Front
How do you convert the area of a circle from square meters to square centimeters?
Back
Multiply the area in square meters by 10,000, since 1 m² = 10,000 cm².
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