Unit 6 Geometry Set 1
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30 terms
Terms | Definitions |
|---|---|
 :Point | a dot that represents a location in space |
| Line | a straight path of points that extends forever in opposite directions |
| Plane | a flat surface that extends forever in all directions |
| Ray | part of a line that has one endpoint and extends forever in one direction |
| Line segment | part of a line with 2 endpoints |
| Congruent | having the same measures |
| Angle | two rays that begin at the same point and go in different directions |
| Vertex | the point at the corner of an angle |
| Measure of an angle | number of degrees in an angle |
| Congruent angles | angles that have the same measure |
| Acute angle | an angle measuring less than 90 degrees |
| Right angle | an angle measuring exactly 90 degrees |
| Obtuse angle | an angle measuring greater than 90 degrees but less than 180 degrees |
| Straight angle | an angle measuring exactly 180 degrees |
| Perpendicular lines | two lines that intersect at 90 degree angles |
| Parallel lines | two lines that lie in the same plane but never meet |
| Transversal | a line that intersects two or more lines in a plane at different points |
| Vertical angles | two angles that are NOT adjacent and whose sides are formed by intersecting lines |
| Adjacent angles | two angles with a common vertex and side but no common interior points |
| Corresponding angles | angles formed by two parallel lines intersected by a transversal |
| Consecutive angles | angles on the same side of the transversal |
| Alternate angles | angles on different sides of the transversal |
| Interior angles | angles inside of the lines |
| Exterior angles | angles outside of the line |
| Consecutive interior angles | angles that are on the same side of the transversal and inside the two lines |
| Alternate exterior angles | Angles that lay outside the parallel lines and are on opposite sides of the transversal |
| Alternate interior angles | Angles that lie within a pair of lines and on opposite side of a transversal |
| Complementary angles | adjacent angles whose sum is 90 degrees |
| Linear pair | a pair of adjacent angles whose uncommon sides are on opposite rays |
| Supplementary angles | adjacent angles whose sum is 180 degrees |
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