Review of Circles
Flashcard
•
Mathematics
•
9th - 10th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a circle?
Back
A circle is a set of points in a plane that are equidistant from a fixed point called the center.
2.
FLASHCARD QUESTION
Front
What is the formula for the circumference of a circle?
Back
The circumference C of a circle is given by the formula C = 2πr, where r is the radius.
3.
FLASHCARD QUESTION
Front
What is the formula for the area of a circle?
Back
The area A of a circle is given by the formula A = πr², where r is the radius.
4.
FLASHCARD QUESTION
Front
What is a radius?
Back
A radius is a line segment from the center of the circle to any point on the circle.
5.
FLASHCARD QUESTION
Front
What is a diameter?
Back
A diameter is a line segment that passes through the center of the circle and has its endpoints on the circle. It is twice the length of the radius.
6.
FLASHCARD QUESTION
Front
What is a chord?
Back
A chord is a line segment whose endpoints lie on the circle.
7.
FLASHCARD QUESTION
Front
What is a tangent?
Back
A tangent is a line that touches the circle at exactly one point.
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