Geometry

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Across
  1. 4. A closed four-sided figure with parallel opposite sides. Sometimes called a diamond
  2. 6. 2 lines that meet to make a corner
  3. 10. a closed figure with 3 sides
  4. 11. a closed figure with 8 sides
  5. 12. the meeting of two faces on a three-dimensional shape
  6. 13. an informal word to describe angles of objects
  7. 14. without a curve
Down
  1. 1. a three-dimensional figure with identical equilateral squares as faces
  2. 2. a solid or hollow object that tapers from a circular or roughly circular base to a point
  3. 3. identical in form
  4. 4. another name for 90-degree angle
  5. 5. a round body whose surface is at all points equidistant from the center
  6. 7. surface planes of three-dimensional shapes
  7. 8. having a plane-like quality
  8. 9. a specific position on a line, plane, or in space