points, lines, planes, angles
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17 terms
Terms | Definitions |
|---|---|
 point | exact location |
| line | straight path that extends without end in opposite direction |
| line segment | part of a line made up of two endpoints and all points in between |
| ray | has one endpoint, from endpoint ray extends without end in one direction |
| angle | formed by two rays with a common endpoint |
| vertex | endpoint of an angle |
| acute angle | angles that measure less than 90 degrees |
| obtuse angle | measures more than 90 degrees and less than 180 degrees |
| right angle | measures exactly 90 degrees |
| adjacent angles | angles in the same plane that have a common endpoint and a common side |
| complementary angles | angles that combine to form 90 degrees |
| supplementary angles | angles that combine to form 180 degrees |
| parallel lines | lines in a plane that do not intersect |
| skew lines | lines that lie in different planes that are neither parallel nor intersecting |
| alternate interior angles | a pair of angles formed by two parallel lines intersected by a third line - alternate interior angles are between the parallel lines on opposite sides of the intersect |
| alternate exterior angles | a pair of angles formed by two parallel lines intersected by a third line - alternate exterior angles are on the outside of the parallel lines on opposite sides of the intersect |
| Corresponding angles | Angles in the same position when the third line intersects the parallel lines |
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