Study prep for Unit 1 quiz: Units 1-3 to 1-7 Flashcards
Study prep for quiz
Length of a segment?
The positive real number that is the distance between the endpoints.
The length is written as AB.
Notation: AB
Bisect?
A midpoint is said to bisect a segment because it divides the segment into 2 congruent segments.
Between?
To be between 2 points, a point must lie on the same line that is defined by the 2 points.
Line?
A geometrical object with zero thickness and zero width that is infinitely long.
Notation: Line AB or
AB with a line over top of it.
Interior of an angle?
All the points between the 2 rays that form the angle.
Exterior of an angle?
All the points outside the 2 rays forming the angle.
Vertex of an angle?
The common endpoint of the 2 rays forming an angle.
Angle?
A figure made of 2 noncollinear rays with a shared endpoint.
Notation: <ABC, m<ABC, <A, <1
<1 is only used if the figure has the angle labeled as 1.
Perpendicular Bisector?
A line or line segment that intersects a second line segment at right angles and divides it into 2 congruent parts.
Non coplanar points?
4 or more points that do not lie on the same plane.
Opposite rays?
Rays that share a common endpoints and extend in opposite directions on the same line.
Skew lines?
Noncoplanar therefore are not parallel and they do not intersect.
Coplanar Points?
3 or more points that lie on the same plane.
Vertical angles?
2 sets of angles whose sides are opposite rays.
Intersection?
The set of all points common to 2 (or more) entities.
Sides of an angle?
The 2 rays that make up the angle.
Parallel lines?
Coplanar lines that do not intersect.
Notation: 2 lines that have this symbol > drawn in the middle of them.
Line segment?
Part of a line consisting of 2 endpoints and all the points between them.
Notation: Segment AB or AB with
a line segment drawn over it.
Collinear rays?
Two rays that lie on the same line.
Noncollinear rays?
Rays that do not lie on the same line.
Coplanar lines?
Lines that lie on the same line.
Space?
A region usually a 3-dimensional region, in which points can be located.
Collinear points?
2 or more points that lie on the same line.
Adjacent angles?
2 coplanar angles with a common side, common vertex, and no common interior points.
Point?
A precise location in space with zero length, zero width, and zero depth. Points can be represented in diagrams by a dot and a capital letter.
Notation: Point A or
. A
Plane?
A flat surface with zero thickness that is infinitely long and infinitely wide.
Midpoint?
A point that divides the segment into 2 congruent segments.
Congruent segments?
Segments with the same length.
Notation: = with squiggly line above it
Example: Line segment AB is = (with squiggly line above it) to Line segment CD.
Non collinear?
3 or more points that do not lie on the same line.
Opposite rays?
2 collinear rays with the same endpoint extending in different directions.
Angle bisector?
A ray that divides an angle into 2 congruent angles.
