Unit 1 Vocabulary

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Across
  1. 3. father of geometry
  2. 5. flat and 2-dimensional
  3. 6. statement assumed to be true without proof
  4. 7. not flat and 3-dimensional
  5. 8. location designated by a point
  6. 9. part of a line with a fixed starting point and no endpoint
  7. 11. formed by two rays and common endpoint
  8. 12. statement that needs to be proven to be true
  9. 13. two nonintersecting lines going in two directions
Down
  1. 1. part of a line that has two endpoint
  2. 2. two lines cross at 90 degrees
  3. 4. continuous in both directions and straight
  4. 8. two nonintersecting lines going in same direction
  5. 10. points, lines and planes are _______ terms