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GEO Vocab

Geometry Vocabulary

QuestionAnswer
line passes through at least 2 points and extends forever in both directions, named AB or BA with the line symbol over it.
line segment part of a line that has a start and end point, it can be named in either direction, CM or MC with the line segment symbol over it.
ray a line with a fixed start point which continues forever in one direction, it can be named in ONE WAY.
vertex common angle formed by two rays that create a v shape
parallel lines lines that remain equidistant from each other and never cross (railroad tracks)
perpendicular lines lines that cross through each other and create 90 degree angles.
interior angles angles that are on the inside
exterior angles angles that are on the outside
linear pairs (supplementary angles) angles that equal 180 degrees
corresponding angles angles that are located in the same position
adjacent angles angles that are next to each other
transversal a line that cuts through other lines
collinear three or more points are considered collinear if they are on the same line
coplanar two or more points that lie on the same plane
angle bisector a ray that cuts an angle into 2 equal angles
congruent of equal angle degrees or line segment length
point an exact location, named with one letter M
midpoint when 3 points are on a line, the middle point is considered the midpoint, it creates 2 line segments of equal length.
equidistant points that measure the same distance from another point
plane a flat surface that continues forever in every direction (piece of paper, table top), it is named with a letter
angle shape formed by two lines or rays that have a common end point (vertex)
verticle angles angles that are in opposite positions that are the same degree measure
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