geometry

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Across
  1. 2. a figure formed by 3 segments
  2. 4. a polygon with 4 sides and 4 angles
  3. 6. straight path that has no ending
  4. 8. line segments that have the same length
  5. 13. two lines that intersect to form a right angle
  6. 14. union of 3 or more segments that meet only at endpoints
  7. 16. angle less than 90 degrees
  8. 17. angle more than 90 degrees
  9. 18. a line which cuts an angle into two equal halves
Down
  1. 1. lines that intersect to form a right angle
  2. 2. two angles who's sum is a right angle
  3. 3. could be more or less than 90 degrees
  4. 5. the middle point of a line segment
  5. 6. drawn from a vertex to a midpoint
  6. 7. a location represented by a dot
  7. 9. a three sided polygon
  8. 10. a polygon made with a continuous line
  9. 11. angle formed by two rays with a common end point
  10. 12. a set of points with infinite length
  11. 15. two lines that never intersect