Ashrita G.

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Across
  1. 2. half the diameter
  2. 5. lines from side to side
  3. 7. triangle with all equal sides
  4. 11. lines that intersect at a right angle
  5. 12. double the radius
  6. 13. lines that border an object
  7. 14. 3D movies have 3 of these
Down
  1. 1. lines that will never touch if extended
  2. 3. shows 3 faces of an object
  3. 4. language of industry
  4. 6. a method of projection
  5. 8. lines that go up and down
  6. 9. obtuse, acute and right
  7. 10. 3 kinds; cavalier, normal, oblique
  8. 13. shape with 8 sides