Circles

Flashcard
•
Mathematics
•
9th Grade
•
Hard
+2
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a circle?
Back
A circle is a shape consisting of all points in a plane that are at a given distance (radius) from a fixed point (center).
2.
FLASHCARD QUESTION
Front
What is the radius of a circle?
Back
The radius is the distance from the center of the circle to any point on its circumference.
3.
FLASHCARD QUESTION
Front
What is the diameter of a circle?
Back
The diameter is the distance across the circle through the center, equal to twice the radius.
Tags
CCSS.HSG.C.A.2
4.
FLASHCARD QUESTION
Front
What is the circumference of a circle?
Back
The circumference is the distance around the circle, calculated as C = 2πr, where r is the radius.
Tags
CCSS.7.G.B.4
5.
FLASHCARD QUESTION
Front
What is the area of a circle?
Back
The area is the space contained within the circle, calculated as A = πr², where r is the radius.
Tags
CCSS.7.G.B.4
6.
FLASHCARD QUESTION
Front
What is a chord in a circle?
Back
A chord is a line segment with both endpoints on the circle.
7.
FLASHCARD QUESTION
Front
What is a tangent to a circle?
Back
A tangent is a line that touches the circle at exactly one point.
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