| A | B |
|---|
| Geometry | the study of points, lines, angles, surfaces, and solids. |
| point | a location in space represented by a dot. |
| line | a set of many points that extend in opposite directions w/out ending. |
| plane | a two-dimensional flat surface. |
| ray | a set of points that is part of a line. |
| A ray has one ___ & extends in 1 direction with ___ end. | endpoint;no |
| postulate | a statement about geometric figures accepted as true w/out proof. |
| A formal definition _____ be given for point, line, & plane. | cannot |
| collinear | points on the same line. |
| line segment AB | AB is the set of points A, B, and all the points between A & B. |
| endpoints AB | A&B = endpoints of AB where AB = set of points A,B,& all the points between A&B. |
| set | a collection of particular things, like the set of points on a line segment. |
| the absolute value of a number is: | equivalent to its distance from zero on the number line. |
| angle | a figure made up of two sides, or rays, with a common endpoint. |
| vertex | the point common to both sides of an angle. |
| compass | a tool used to draw circles & parts of circles called arcs. |
| arc | part of a circle. |
| construction | process of making a line, angle, or figure according to specific requirements. |
| bisect | to divide into two equal parts. |
| angle bisector | ray that divides an angle into two equal parts. |
| degree | a unit of angle measurement. |
| protractor | a tool used to draw or measure angles. |
| acute angle | an angle whose measure is greater than 0 degrees and less than 90 degrees. |
| right angle | an angle whose measure is 90 degrees. |
| obtuse angle | an angle whose measure is great then 90 degrees but less than 180 degrees. |
| straight angle | an angle whose measure is 180 degrees. |
| perpendicular lines | lines that form right angles. |
| adjacent angles | angles with a common vertex and one common side. |
| complementary angles | two angles whose measures add to 90 degrees. |
| supplementary angles | two angles whose measures add to 180 degrees. |
| intersect | to meet at a point; to cross or overlap each other. |
| vertical angles | angles that have a common vertex & whose sides are formed by the same lines. |
| exponent | the number of times a base is multiplied by itself. |
| base | the number being multiplied by itself. |
