Math Puzzle

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Across
  1. 4. a three dimensional figure with faces that are polygons
  2. 7. a quadrilateral with exactly one pair of parallel sides
  3. 8. type of faces on a polyhedron
  4. 10. same thing as decimals
Down
  1. 1. having the same size and shape
  2. 2. 1 ____ equals 16 ounces
  3. 3. the measure of how heavy something is
  4. 5. the amount of time that passes between two periods
  5. 6. a metric unit of weight
  6. 9. amount of matter in an object