Gram/Graph and Meter/Metr Greek Roots

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Across
  1. 4. a short piece of writing all on one subject
  2. 6. the study of shapes
  3. 8. the distance across a circle
  4. 9. a tool used to take temperatures
Down
  1. 1. a signature from someone
  2. 2. a book about someone's life
  3. 3. an illustration of data
  4. 4. a small gadget used to count steps
  5. 5. a gauge for measuring the speed of your car
  6. 7. the distance around the outside of a shape