Clue 3

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Across
  1. 4. endpoint and goes on forever
  2. 5. shape with 4 sides
  3. 10. goes on forever
  4. 11. parallelogram with right angles
  5. 12. meets at perpendicular
  6. 16. lines that meet at a right angle
Down
  1. 1. rectangle with equal sides
  2. 2. an angle smaller than right
  3. 3. 2 sets of parallel lines
  4. 6. line with endpoints
  5. 7. where edges come together
  6. 8. where tow lines come together
  7. 9. and angle more than right
  8. 13. lines that never touch
  9. 14. a place in space
  10. 15. 1 set of parallel sides