16 terms

Geometry

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acute angle
an angle that measures less than 90 degrees
right angle
an angle that measures 90 degrees
obtuse angle
An angle that measures more than 90 degrees but less than 180 degrees
adjacent angles
Two angles that share a common side and have the same vertex
complementary angles
Two angles whose measures add to 90 degrees.
congruent
Figures that have the same size and shape
line
A straight path that goes without end in two directions.
measure of an angle
the number of degrees between the two rays
plane
A flat surface that extends forever
point
location in space
ray, opposite rays
a part of a line that starts at one endpoint and extends forever
segment
part of a line determine by two endpoints
sides of an angle
The two rays that form an angle.
supplementary angles
two angles that add up to 180 degrees
vertex of an angle
The common endpoint of the rays of an angle
vertical angles
two nonadjacent angles formed by two intersecting lines; Their measures are equal
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