Quizlet Geometry Vocab

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  1. acute angle: an angle whose measure is greater than 0 degrees and less than 90 degrees
  2. angle: a geometric figure formed by two rays that have a common endpoint
  3. bisect: to cut into two congruent parts
  4. collinear: points that lie on the same line
  5. complementary angles: two angles whose sum measures 90 degrees
  6. congruent: having the same size and shape
  7. coplanar: any three or more points that lie in the same plane
  8. intersect: to meet at a point
  9. line: an infinite number of points that goes on forever in both directions
  10. line segment: an infinite number of points that has two distinct end points
  11. midpoint: The point that divides a segment into two congruent segments.
  12. obtuse angle: an angle whose measure is greater than 90 degrees and less than 180
  13. perpendicular: lines that intersect to form right angles
  14. plane: a flat surface of points that goes on forever in all directions
  15. point: a location in space (it has no dimensions)
  16. ray: an infinite set of points that starts at a point and goes on forever
  17. right angle: an angle formed by two perpendicular lines, the measure of which is 90 degrees
  18. straight angle: an angle whose measure is 180 degrees
  19. supplementary: two angles whose sum measures 180 degrees
  20. vertex: the point of intersection of the two rays that form the sides of the angle