Maths crossword

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Across
  1. 3. a 3D shape with a constant cross-section
  2. 8. the name of the scales on a graph
  3. 12. meeting at a right angle
  4. 14. the outside of a circle
  5. 16. number of metres in a kilometre
  6. 18. a 3D shape where all the lengths and faces are the same
  7. 19. how much space there is inside a 2D shape
  8. 20. number of centimetres in a metre
  9. 23. a quadrilateral with two sets of parallel sides but no right angles
Down
  1. 1. where a line meets the y axis
  2. 2. a quadrilateral with exactly one pair of parallel sides
  3. 4. the slope of a line
  4. 5. the distance across a circle
  5. 6. number of millimetres in a centimetre
  6. 7. another word for speed
  7. 9. how much the numbers of the axis go up by
  8. 10. the length of the outside of a shape
  9. 11. a part of the outside of a circle
  10. 13. two lines with the same gradient are
  11. 15. the distance from the middle to the outside of a circle
  12. 17. the area under a speed time graph
  13. 21. how much space there is inside a 3D shape
  14. 22. a part of a circle sliced like a pizza