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Ms. Bowman's Vocab.

Geometry Chapter 1

Conjecture An unproven statement that is based on observations
Point Has no dimension
Line Extends in one dimension
Plane Extends in two dimensions
Segment Part of a line that consists of two points, called endpoints, and all points on the line that are between the endpoints.
Ray Part of a line that consists of a point, called an initial point, and all points on the line that extend in one direction.
Postulate Rules that are accepted without proof. Also called axioms.
Length of a Segment The distance between the endpoints of a segment.
Congruent Segments Segments that have the same length
Congruent Angles Angles that have the same measure.
Acute Angle Angle which measures between 0 and 90 degrees.
Right Angle Angle which measures exactly 90 degrees.
Obtuse Angle Angle which measures between 90 and 180 degrees.
Straight Angle Angle which measures exactly 180 degrees.
Segment Bisector A segment, ray, line, or plane that intersects a segment at its midpoint.
Angle Bisector A ray that divides an angle into two adjacent angles that are congruent.
Vertical Angles Two angles whose sides form two pairs of opposite rays.
Complementary Angles Two angles whose measures have the sum 90 degrees.
Created by: bibowman