Rio's Maths Crossword

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Across
  1. 2. all my sides are the same length
  2. 4. I am a shape with 8 sides
  3. 5. use me to draw a line
  4. 6. I am how to put numbers together
  5. 8. take away one number from another
  6. 9. use me to find the angle
Down
  1. 1. I am a machine for adding up
  2. 3. I am used in degrees
  3. 6. I am an angle less than a right angle
  4. 7. I am an angle always bigger than a right angle