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# Geometry Ch1 Vocab

### MD Geometry Chapter 1 Vocabulary

Is a line, segment, ray or plane that intersects a segment at it's midpoint. segment bisector
A pair of adjacent angles whose non-common sides are opposite rays linear pair
Are collinear ray with the same endpoints that form a line. opposite ray
Formed by 2 rays with the same endpoint. The common endpoint is the vertex. angle
Set of values that show an exact position. This is the distance and position from the origin of a number line. coordinate of a point
It is undefined, has no thickness, and is a flat surface. plane
Are two angles whose sides form 2 pairs of opposite rays. vertical angles
A part of a line that consists of 2 points called endpoints and all the points between them. segment
Segment that have the same length. congruent segments
Angle that equals 90 degrees. right angle
Not in the same plane. non-coplanar
Is the point that the segment in to two congruent halves or the point right in the middle. midpoint
Common point or end point of an angle. vertex of the angle
Are angles that have the same measure. congruent angles
Rays of an angle. side of an angle
Two coplanar angles that have one common side and a common vertex but no common interior. adjacent angles
In the same plane. coplanar
Is a ray that divides an angle into two congruent angles. angle bisector
Is the part of a line that consists of one endpoint and all of the points of the line on one side of the endpoint. ray
Is an accepted statement or fact postulate or axiom
Two angles are ________ if the sum of their measures is 180 degrees. supplementary angles
A angle whose measure is equal to 180 degrees. straight angle
Is the set of all points. space
Two angles are _______ if the sum of the measure is 90 degrees. complementary angles
The absolute value of the distance of the coordinates of the points. distance between 2 points on a line
Points that do not lie on the same line. non-collinear
Is a 2 dimensional pattern that you can fold to form a 3 dimensional figure. net
Points lying in the same straight line. collinear
It is undefined, a straight path in two ways, and no endpoint. line
It is undefined, is thought of as a location, and has no size point
The______ of 2 or more geometric figures is the set of points the figures have in common. intersection
Angle smaller than 90 degrees. acute angle
Angle greater that 90 degrees. Obtuse angle
Created by: LForzley