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geometry
morphew chapter 9
23
Mathematics
10th Grade
03/13/2009

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Term
Arc Length
Definition
The linear distance representing the arc
Term
Center
Definition
In a circle, a point from which all given points in a plane are equidistant
Term
Central Angle
Definition
For a given circle, an angle that intersects the circle in two points and has its vertex at the center of the circle.
Term
Chord
Definition
For a given circle, a segment whose endpoints are points on the circle.
Term
Circle
Definition
A set of points that consist of all points in a plane that are a given distance from a given point in the plane
Term
Circumference
Definition
The distance around a circle.
Term
Circumscribed polygon
Definition
This occurs when each side of a polygon is tangent to a circle
Term
Common External Tangent
Definition
A common tangent that does not intersect the segment whose endpoints are the centers of the two circles. it does not go in between the circles.
Term
Common Internal Tangent
Definition
A common tangent that intersects the segment whose endpoint are the centers of the two circles. IT DOES go in between the circles.
Term
Concentric Circles
Definition
Circles that lie in the same place and have the same center but have different radii
Term
Diameter
Definition
In a circle, a chord that contains the center of the circle.
Term
Inscribed angle
Definition
An angle having its vertex lie on a given circle containing two chords of a circle.
Term
Inscribed polygon
Definition
A polygon in which each of its vertices lie on the circle.
Term
Intercepted arc
Definition
An arc that is contained within an angle within a circle.
Term
Inscribed angle
Definition
an angle having its vertex lie on a given circle containing two chords of a circle.
Term
Minor arc
Definition
An arc that has a measure less than 180
Term
Pi
Definition
The ratio of the circumference of a circle to its diameter
Term
Major arc
Definition
An arc with a measure greater than 180.
Term
Point of tangency
Definition
For a line that intersects a circle in only one point, this is the point in which they intersect.
Term
Radius
Definition
In a circle, this is the segment whose endpoints are the center and a point on the circle.
Term
Secant
Definition
For a circle, a line that intersects the circle in exactly two points.
Term
Semicircle
Definition
An arc with the measure of exactly 180.
Term
Tangent
Definition
A line that intersects a circle at exactly one point.
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