Mathematics is Fun!

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Across
  1. 1. solid with uniform cross section
  2. 5. everyone's favourite mathematician
  3. 7. the m in y=mx + c
  4. 8. perimeter of a circle
  5. 9. Mrs Lee's favourite subject!
  6. 11. find the value of an unknown
  7. 14. the middle value
  8. 16. plane figure with at least 3 straight sides
  9. 17. 4 sided figure with only 1 pair of // lines
  10. 18. remove the brackets in an algebraic expression
  11. 19. sin cos tan
  12. 20. shape of half an orange
Down
  1. 2. make an algebraic expression less complex
  2. 3. opposite of expand
  3. 4. having same shape and size
  4. 6. the type of equations you solve as a pair
  5. 10. look like bar graph but no gaps in between
  6. 12. the space an object occupies
  7. 13. the order of small to big
  8. 15. the 'Z' shape = ________ angles