Maths Crossword

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Across
  1. 4. to decrease a price
  2. 9. a shape with three or more sides
  3. 10. the outside
  4. 11. a degree of speed or progress
  5. 12. the side of a right angle triangle that is opposite to the right angle
  6. 13. to be touching
  7. 14. to make a number go down
  8. 15. to make a number less complex
  9. 17. a nine sided shape
Down
  1. 1. the amount of something
  2. 2. to make a number go up
  3. 3. a four sided shape
  4. 5. a triangle with to angles the same size
  5. 6. what is earned
  6. 7. being the other of two related things
  7. 8. an educated guess
  8. 15. a triangle without any angles the same size
  9. 16. to keep going