definitions Flashcards
(23 cards)
point
a location.
space
set of all points
line
series of points extending in 2 opposite directions
collinear points
points that lie on the same line
plane
a flat surface that has no thickness
coplaner
points and lines in the same plane
segment
part of a line consisting of 2 endpoints and all points between them
ray
part of a line consisting of one endpoint and all the points on one side of the endpoint
opposite rays
2 collinear rays with the same endpoint
parallel lines
coplaner lines that don’t intersect
skew lines
non-coplaner, therefor not parallel and don’t intersect
parallel planes
planes that don’t intersect
congruent
equal in size and length
angle
2 rays with the same endpoint
acute angle
0 < x < 90
right angle
x = 90
obtuse angle
90 < x < 180
straight angle
x = 180
vertical angles
2 angles whose sides are opposite rays
adjacent angles
2 coplaner angles with a common side, vertex and no common interior points
complementary angles
2 angles whose measures sum to 90
supplementary angles
2 angles whose measures sum to 180
transversal
line that intersects 2 coplaner lines at two distinct point
