Summer's Maths Crossword

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