## Geometry

##### Created by:

Axia  on February 24, 2009

Daniel

Ms. Nishimoto

Toll MS

Algebra

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# Geometry

 collinear pointspoints on the same line
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#### Definitions

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
adjacent angles Two angles with a common side, a common vertex, and no common points within the angles
supplementary angles Two angles that add to 180ยบ 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

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