Chapter 1 Vocabulary

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Across
  1. 5. points that lie on the same line are called ____.
  2. 9. part of a line that has two endpoints
  3. 10. a statement that proves a conjecture false.
  4. 11. if B is between A and C, then this proves AB+BC=AC.
  5. 13. to cut into two congruent pieces.
  6. 14. part of a line that has one endpoint and continues in one direction
  7. 16. angles that add up to equal 180 degrees
Down
  1. 1. to have a common vertex and a common side
  2. 2. angles that lie across from the intersection of two lines.
  3. 3. consists of two rays and a common vertex
  4. 4. a conclusion
  5. 5. angles that add up to equal 90 degrees
  6. 6. to have equal measure.
  7. 7. continues indefinitely in opposite directions
  8. 8. if Q is in the interior of angle ABC, then this proves ABQ+QBC=ABC.
  9. 11. lines that are not parallel and do not intersect are called ____.
  10. 12. a location
  11. 15. has no thickness and contains at least three noncoplanar points
  12. 17. a point that cuts a segment into two congruent segements