Who is Euclid?

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Across
  1. 3. He is best known for his work with...
  2. 4. The place and date of Euclid’s death are...
  3. 5. His books proved how the...relate to one another.
  4. 7. Euclid was an ancient... mathematician.
Down
  1. 1. Euclid wrote a series of 13 books about geometry, called the...
  2. 2. Euclid was born in about 300 BC in..., Egypt.
  3. 6. Euclid wrote about other topics,like optics (the study of light) and ...