Geometry

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Across
  1. 4. a four-sided polygon
  2. 5. a seven-sided polygon
  3. 8. a five-sided polygon
  4. 11. the middle value on a line/dot plot
  5. 12. an eight-sided polygon
Down
  1. 1. an eleven-side polygon
  2. 2. a twelve-sided polygon
  3. 3. a three-sided polygon
  4. 6. a nine-sided polygon
  5. 7. a six-sided polygon
  6. 9. a ten-sided polygon
  7. 10. the balancing point on a line/dot plot