Basic Vocabulary of Geometry

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Basic Vocabulary of Geometry

• Points, Lines Planes
• (and more)

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Space
Everything The collection of all possible points
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Labels add important info!
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Point
An exact location in space
Label with capital letter
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Line
A collection of points that extends infinitely in
two directions
Label with cursive lowercase letter Or Any TWO
points from the line under a ?
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Collinear points
Points that lie on the same line
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Noncollinear points
Points that do NOT lie on the same line
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Endpoint
A point at which a line segment or ray ends
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Line Segment
Consists of two endpoints and all the points
between them
Label with TWO endpoints of the line segment
under a __
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Ray
Has one endpoint and continues infinitely in ONE
direction
Label with Endpoint of the ray and another
point from it under a ?, pointing in the
direction of the extending ray
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Opposite Rays
Two rays with a common endpoint that together
form a line
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Plane
A flat surface that extends infinitely in all
directions
Label with A capital cursive letter OR 3 points
from the plane after the word plane
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Coplanar Points
Points that lie on the same plane
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Noncoplanar Points
Points that do NOT lie on the same plane
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Intersection
A point or set of points common to two or more
geometric figures