Maths crossword

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Across
  1. 3. number that goes on forever
  2. 6. a polygon with six sides
  3. 7. the length of the outside of an area of land
  4. 8. and angle bigger than 50 but smaller than 120
Down
  1. 1. the middle number
  2. 2. the number at the top of a fraction
  3. 4. Name of a triangle with two equal sides
  4. 5. a decimal that ends
  5. 9. two quarters make a