26 terms

# Chapter 1 Geometry Jurgensen

This is the vocabulary for Geometry by Ray Jurgensen, Richard Brown, and John Jurgensen published by McDougal Littell.
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Equidistant
equally distant from two points
Undefined terms
Point, line, plane
Collinear
lying on the same line
Coplanar
lying in the same plane
Intersection (of two figures)
The set of points that are in both figures
Through any two points there is
Exactly one line
Through any three non collinear points there is
Exactly one plane
Through any three points there is
At least one plane
Ray
A straight line extending from a point
Oblique plane
A diagonal or tilted plane
Intersect
When at least two lines, rays, or segments meet at one point.
Non coplanar
Not in the same plane
If B is between A and C, then AB+BC=AC
if point B lies in the interior of <AOC then m<AOB + m<BOC = m<AOC. If ∠AOC is a straight angle and B is not on ray AC, then m∠AOB + m∠BOC = 180.
Sides of an angle
the two rays that form the angle
Vertex
The common endpoint of an angle
Acute angle
an angle less than 90 degrees but more than 0 degrees
Right angle
an angle that measures 90 degrees
Obtuse angle
an angle between 90 and 180 degrees
Straight angle
an angle that measures 180 degrees
Protractor postulate
On line AB in a given plane, choose any point O between A and B. Consider →OA and →OB and all the rays that can be drawn from O on one side of line AB. These rays can be paired with the real numbers from 0 to 180 in such a way that: a) →OA is paired with 0, and →OB with 180. b) If →OP is paired with x, and →OQ with y, then m∠POQ = |x - y|.
Congruent angles
angles that have the same measure