20 terms

Geometry Vocab

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plane
a flat surface of points that goes on forever in all directions
complementary angles
two angles whose sum measures 90 degrees
line segment
an infinite number of points that has two distinct end points
supplementary
two angles whose sum measures 180 degrees
ray
an infinite set of points that starts at a point and goes on forever
obtuse angle
an angle whose measure is greater than 90 degrees and less than 180
bisect
to cut into two congruent parts
line
an infinite number of points that goes on forever in both directions
acute angle
an angle whose measure is greater than 0 degrees and less than 90 degrees
right angle
an angle formed by two perpendicular lines, the measure of which is 90 degrees
straight angle
an angle whose measure is 180 degrees
vertex
the point of intersection of the two rays that form the sides of the angle
angle
a geometric figure formed by two rays that have a common endpoint
collinear
points that lie on the same line
coplanar
any three or more points that lie in the same plane
perpendicular
lines that intersect to form right angles
congruent
having the same size and shape
point
a location in space (it has no dimensions)
midpoint
The point that divides a segment into two congruent segments.
intersect
to meet at a point
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