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Quarter I
Topic II F Circle Definitions
9
Mathematics
8th Grade
08/19/2012

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Cards

Term

Center

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Definition
 
- The middle. Such as the center of a circle or square.
Term

Chord

 

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Definition
- A straight line connecting two points on a curve.
- Example: a straight line connecting two points on a circle's circumference would be a chord.
- When the chord passes through the center of a circle it is called the diameter.
Term

Radius

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Definition
- The distance from the center to the edge of a circle
- It is half of the circle's diameter
Term

Tangent

 

 

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Definition
- A line that just touches a curve at one point, without cutting across it.
Term

Secant

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Definition
 
- A line that intersects two or more points on a curve.
- If it only intersects one point it is called a tangent.
Term

Arc

 

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Definition

 

- Part of the circumference (edge) of a circle.
- Or part of any curve.
Term

Semicircle

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Definition
- Half a circle
Term

Concentric Circles

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Definition
-Two or more circles which have the same center point
Term

Diameter

 

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Definition
- A straight line going through the center of a circle connecting two points on the circumference.
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