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Chapter 1 Vocabulary
Geometry
| Question | Answer |
|---|---|
| Has no dimensions and is represented by a dot | Point |
| A line that consists of two endpoints and all of the points in between | Line Segment |
| It has two dimensions and resembles a floor or wall. It extends without end in all directions. | Plane |
| Has one dimension and is represented by a line with two arrowheads, but it extends without end | Line |
| Points that lie on the same line | Collinear Points |
| Points that lie on the same plane | Coplanar Points |
| The point or the set of points two or more figures have in common | Intersection |
| Consists of one endpoint and goes on in one directions without ending | Ray |
| A rule that is accepted without proof | Postulate or Axiom |
| The real number or numbers that corresponds to a point | Coordinate |
| The absolute value of the difference between two coordinates | Distance |
| Line segments that have the same length | Congruent Segments |
| The point that divides the segment into two congruent segments | Midpoint |
| A point, ray, line, line segment, or plane that intersects the segment at its midpoint | Segment Bisector |
| Two different rays with the same endpoint | Angle |
| Each ray of an angle | Sides of Angles |
| The endpoint of an angle | Vertex of Angles |
| The absolute value of the difference between the real numbers measured on a protractor | Measure of Angle |
| An angle that measure between 0° and 90° | Acute Angle |
| An angle that measure exactly 90° | Right Angle |
| An angle that measure between 90° and 180° | Obtuse Angle |
| An angle that measures exactly 180° | Straight Angle |
| Two or more angles that have the same measure | Congruent Angles |
| A ray that divides an angle into two angles that are congruent | Angle Bisector |
| The sum of two angles equals 90° | Complementary Angles |
| The sum of two angles equals 180° | Supplementary Angles |
| Two angles that share a common vertex and side, but have no common interior points | Adjacent Angles |
| Two adjacent angle and their common sides are opposite rays | Linear Pair |
| Two angles whose sides form two pairs of opposite rays | Vertical Angles |
| A closed plane figure formed by three or more line segments and each side intersects two sides one at each endpoint. | Two Properties of Polygons |
| The endpoint of each side of a polygon | Vertices of Polygons |
| Determined by the number of sides “n-gon” | Naming Polygons |
| A polygon that contains no point in the interior of the polygon | Convex Polygon |
| A polygon that contains a point in the interior of the polygon | Concave Polygon |
| All sides are congruent | Equilateral |
| All angles in the interior of the polygon are congruent | Equiangular |
| A convex polygon that is both equilateral and equiangular | Regular Polygon |
| 3-sided polygon | Triangle |
| 4-sided polygon | Quadrilateral |
| 5-sided polygon | Pentagon |
| 6-sided polygon | Hexagon |
| 7-sided polygon | Heptagon |
| 8-sided polygon | Octagon |
| 9-sided polygon | Nonagon |
| 10-sided polygon | Decagon |
| 12-sided polygon | Dodecagon |
| Distance around a figure | Perimeter |
| Distance around a circle | Circumference |
| Amount of surface covered by a figure | Area |
| A chord that passes through the center of a circle | Diameter |
| A segment whose endpoints are the center of the circle and a point on the circle | Radius |
Created by:
warnockj
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