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# Geometry Ch 1

### Geometry Ch 1 Vocab Review

* Formed by two noncollinear rays that have a common endpoint. angle
*Inside of an angle Interior
*Having the same measure. congruent
* An angle whose measure is between 0 and 90 acute angle
* A geometric tool used to draw circles and arcs compass
*Two angles that lie in the same plane, have a common vertex, a a common side but no interior points. adjacent angles
Points that lie on the same line. colinear
*Two angles whose measures have a sum of 90 complementary angles
* A ray that divides an angle into two congruent angles angle bisector
*The sum of the lengths of the sides of a polygon perimeter
* Made up of points and has no thickness or width line
*The point halfway between the endpoints of a segment midpoint
* An angle that measures greater than 90° and less than 180° obtuse
*Outside of an angle Exterior
* Lines that form right angles perpendicular lines
*A location in space Point
*Part of a line. Has 1 endpt, and extends indefinitely on one direction ray
* A flat surface made up of points plane
* An angle that measures 90° right angle
* A closed figure whose sides are all segments polygon
* A pair of adjacent angles whose noncommon sides are opposite rays linear pair
* A part of a line that consists of two endpoints line segment
* Two angles whose measures have a sum of 180 supplementary
* A unit of measure used in measuring angles and arcs degree
* Two nonadjacent angles formed by two intersecting lines vertical angles
* Any segment, line, or plane that intersects a segment at its midpoint segment bisector
* A polygon in which there are points contained in the interior of the polygon concave polygon
* A polygon in which no points are contained in the interior of the polygon convex polygon
Created by: ang2lawson