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# OL Chp8

### Chapter 8 Vocab

An exact location. Point
A straight path that extends without end in opposite directions. Line
A perfectly flat surface that extends infinitely in all directions. Plane
It has one endpoint and extends without end in one direction. Ray
A part of a line or a ray that extends from one endpoint to another. Line Segment
An angle that measures exactly 180 degrees. Straight
Two angles when added together equal 90 degrees. Complementary
Two angles when added together equal 180 degress. Supplementary
Intersecting lines that form 90 degree angles. Perpendicular
Lines that do not intersect. Parallel
Lines that do not intersect and are not parallel. Skew
Angles that have a common vertex and a common side. Adjacent
Opposite angles formed by two intersecting lines. Vertical
Angles on the same side of the transversal and are both above or below the parallel lines. Corresponding
A set of all points in a plane that are the same distance from a given point. Circle
Part of a circle names by its endpoints. Arc
A line segment that passes through the center of a circle and whose endpoints line on the circle. Diameter
A line segment whose endpoints are any two points on a circle. Chord
A line segment whose endpoints are the center of a circle and any point on the circle. Radius
A closed plane figure formed by three or more line segments. Polygon
A polygon in which all sides are congruent and all angles are congruent. Regular
A triangle that has no congruent sides. Scalene
A triangle that has 2 congruent sides. Isosceles
A triangle with 3 congruent sides. Equilateral
A triangle in which all of the angles are less than 90 degrees. Acute
A triangle that has exactly one angle greater than 90 degrees. Obtuse
A triangle that has exactly one angle that is equal to 90 degrees. Right
Created by: hoffman_mike