Geometry

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Across
  1. 2. Without a curve
  2. 4. Surface planes of three-dimensional shapes
  3. 7. Closed figure with three sides
  4. 8. The meeting of two faces on a three-dimensional shape
  5. 9. Closed figure with 6 sides
Down
  1. 1. A specific position of a line
  2. 2. A figure with four sides
  3. 3. Two lines that meet to make a corner
  4. 5. Identical in size and shape
  5. 6. Two lines that do not meet