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Ms. Bowman's Vocab.
Geometry Chapter 1
Question | Answer |
---|---|
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. |