Geometry

12345678
Across
  1. 2. upright
  2. 3. something-you-fly-on
  3. 7. stripe
  4. 8. all-sides-are-the-same
Down
  1. 1. a-3d-version-of-a-2d-shape
  2. 2. corner
  3. 4. a-part-of-a-curve
  4. 5. 6-sided-polygon
  5. 6. tip