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24 terms

Geometry flash cards chap. 1

STUDY
PLAY
point
A dot that can be named
Line
A line goes on forever in each direction.
segment
A line that does not go on forever in either direction.
Ray
A line that goes on forever in one direction
Plane
A space that goes on forever that is named by a letter.
opposite Rays
Rays going in opposite directions
Space
A open area
Angle
the space between two lines or planes that intersect
Collinear
On the same line
Coplanar
On the same plane
Midpoint
The point that's directly inbetween two other points.
Bisect
To cut in two
Congruent
The same size
Vertex
The bent point or starting point of a angle
Complementary angles
Two angles whose sum is 90 degrees
Supplementary
sum of angles that equals 180 degrees
Vertical angles
Two lines that intersect and have two pairs of angles.
Adjacent angles
Angles that are right next to each other and add up too 180 degrees.
Linear pair
Two angles that add up to 180
Acute angles
An angle that is less than 90 degrees
Obtuse angle
An angle that is more then 90 degrees
Right angle
An angle that is 90 degrees
Straight angle
An angle that is 180 degrees
Perpendicular
intersecting at or forming right angles