Maths vocabulary

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Across
  1. 6. opposite of narrow
  2. 7. there are fifty-two .....in a year
  3. 9. opposite direction to west
  4. 10. one of four pieces
  5. 12. minutes in half an hour
  6. 16. opposite of most
  7. 17. a third of fifteen
  8. 18. a right angle has .... degrees
  9. 19. another word for take away
  10. 20. the ..... between 10 and 6 is 4
  11. 23. ten years
Down
  1. 1. tenth month of the year
  2. 2. opposite of anti-clockwise
  3. 3. 2D shape with only one side
  4. 4. five sided shape
  5. 5. 3D shape with three faces
  6. 8. the same as
  7. 11. number of grams in a kilogram
  8. 13. number of millimetres in a centimetre
  9. 14. number of days in a fortnight
  10. 15. minutes in quarter of an hour
  11. 21. 3D shape with six identical faces
  12. 22. one of two parts