Shared Flashcard Set

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Geometry
N/A
23
Mathematics
9th Grade
01/26/2010

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Cards

Term
Midpoint
Definition
the midpoint M of PQ is the point between P and Q such that PM ~ MQ
=
Term
Distance Formula
Definition
the formula to find the distance between two points in the coordinates plane
Term
Points,Lines,and Planes
Definition
3 terms that are referred to as undefined terms of Geometry
Term
Point
Definition
is a location usually represented by a dot or a capital letter
ex. Point R or R.
Term
Line
Definition
has two arrows, one at each and indicate that it extends infinitely in each direction
ex. line AB or line n
Term
Postulate
Definition
is an accepted statement or fact
Term
1st. postulate
Definition
Through any 2 points, thereis exactly one line
Term
Collinear
Definition
points that lie on the same line
Term
Noncollinear
Definition
points that do not lie on the same line
Term
Planes
Definition
can be thought of a flat surface that extends infinitely in all directions
Term
Coplanar
Definition
Points that lie on the same plain
Term
Noncoplanar
Definition
Points that do not lie on the same line
Term
2nd postulate
Definition
Two lines intersect at exactly one point
Term
3rd postulate
Definition
Two planes intersect at exactly one line
Term
4th postulate
Definition
Through any three noncollinear points there is exactly one plane
Term
Space
Definition
boundless three dimensional set of all point.
Term
Ray
Definition
has exactly one endpoint and extends infinitely in one direction (always named by its end point)
Term
opposite rays
Definition
Rays that are going in the opposite direction
Term
Parallel Lines
Definition
lines that never intersect
Term
Skew lines
Definition
lines that have no relation; they are neither parallel or perpendicular
Term
parallel planes
Definition
planes that do not intersect
Term
Line segment
Definition
is a part if of a line
Term
Segment Addition Postulate
Definition
little piece + little piece = big piece
If Q is between P and R, then PQ+QR =PR
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