maths terms

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Across
  1. 3. an expression which says 2 things are the same (uses an equals sign)
  2. 4. the distance across a circle, through the centre
  3. 6. a 2d shape with 5 sides
  4. 8. add up
  5. 9. numbers less than 0, numbers you use to take away
Down
  1. 1. the lengths of all sides of a shape added together
  2. 2. a 2d shape with 4 sides, all the same length
  3. 5. times together
  4. 7. a 3d shape with all edges the same length, all faces squares
  5. 10. whole numbers, numbers with no fractional part