Greek Derivatives 3

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Across
  1. 5. having equal force or strength
  2. 7. correct sound
  3. 10. worship of the sun
  4. 11. the study of the origin, history, and structure of Earth
  5. 12. balanced proportions
  6. 14. one color
  7. 15. a vehicle with two wheels
Down
  1. 1. mathematics dealing with lines, angles, surfaces, and solids
  2. 2. the distance around a polygon
  3. 3. foretelling the future by interpreting a randomly chosen passage from a book
  4. 4. a form of government having two joint rulers
  5. 6. sun-centered
  6. 8. instrument for measuring time very accurately
  7. 9. a person who believes in more than one god
  8. 13. unconventional and slightly strange