Maths Crossword

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Across
  1. 2. numbers which can be represented on the no. line
  2. 5. neither prime nor composite
  3. 6. shape having perpendicular diagonals
  4. 8. sum of complementary angles
  5. 9. he discovered √ 2
Down
  1. 1. a line which touches a circle at only one point
  2. 3. 7 sided polygon
  3. 4. property of figures exactly the same (when superimposed)
  4. 7. longest side of a right angled triangle