geo, graph, gon

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Across
  1. 4. a signature
  2. 8. to write or draw a map
  3. 10. the study of the earth’s features; use of coordinates for location (a map)
Down
  1. 1. to write a group of sentences
  2. 2. the study of lines and angles
  3. 3. a closed sided figure with at least 3 sides
  4. 5. a five-sided polygon
  5. 6. the study of the earth’s surface; the study of the layers of earth, rocks and minerals
  6. 7. an eight-sided polygon
  7. 9. a six-sided polygon