Geometry terms

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Across
  1. 4. "immortal" line with one start point
  2. 6. "infinite" line with no start or end points
  3. 7. triangle that has two equal sides
  4. 9. triangle that has all equal sides
  5. 11. triangle that has no equal sides
  6. 13. lines that intersect at right angles
  7. 15. angle less than 90 degrees
  8. 16. angle more than 90 degrees
Down
  1. 1. triangle that has one obtuse angle
  2. 2. angles that equal 180 degrees
  3. 3. "mortal" line with one start point and one end point
  4. 4. 90 degree angle
  5. 5. lines that never cross
  6. 8. triangle that has one 90 degree angle
  7. 10. triangle that has all acute angles
  8. 12. 180 degree angle
  9. 14. angles that equal 90 degrees