44 terms

# Points, Angles, Lines (Basic Geometry)

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collinear points
points on the same line
congruent line segment
Line segments that have the same length
point
a location in space that has no size
line
a set of points that form a stright path extending in oppsite directions without end
angle
figure formed by two rays with the same initial point
geometry
the pure mathematics of points and lines and curves and surfaces
noncolliear points
are points that do not lie on the same line
coplanar points
points all in one plane
intersection
the act of intersecting (as joining by causing your path to intersect your target's path), a place where two or more points meet
midpoint of a segment
The point that divides a segment into two congruent segments.
endpoints
points on the ends of line segments
plane
two dimensional flat surface, extends forever.
space
contains at least 4 points not in one line
obtuse angle
an angle between 90 and 180 degrees
straight angle
an angle of 180 degrees
side
formed by rays
opposite rays
two rays with the same initial point that go in opposite directions
vertex
the point of intersection of lines or the point opposite the base of a figure
bisector of a segment
a line, segment, ray, or plane that intersects the segment at its midpoint
acute angle
an angle less than 90 degrees but more than 0 degrees
congruent angles
Angles that have the same measure
right angle
the 90 degree angle between two perpendicular lines
vertical angles
angles are formed opposite of each other when two lines intersect
bisector of an angle
the ray that divides the angle into two congruent adjacent angles
perpendicular lines
two lines that meet and form a right angle
postulates
assumptions
noncoplaner points
points that are not in the same plane
segment
a part of a line with two endpoints
Two angles with a common side, a common vertex, and no common points within the angles
supplementary angles
Two angles that add to 180º are called
complementary angles
if the sum of two angles is 90%
degree
unit based to measure angles ( symbol )
ray
Part of a line that has one endpoint and extends indefinitely in one direction.
perpendicular bisector
A line that is perpendicular to a segment at its midpoint.
corresponding angles
two angles in corresponding positions relative to two lines cut by a transversal
alternate exterior angles
Two nonadjacent exterior angles on opposite of the transversal.
same side-interior angles
interior angles on the same side of a transversal
exterior lines
The angle on the outside of a transversal.
skew lines
noncoplanar lines that do not intersect
parallel planes
planes that don't intersect
parallel lines
parallel lined
transversal
is a line that intersects each of two other coplanar lines in different points
interior angles
the angle inside of a transversal
alternate interior angles
two nonadjacent interior angles on opposite of the transversal