Maths crossword

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Across
  1. 3. angle angle that goes all the way around
  2. 5. angle 90° angle
  3. 7. to subtract
  4. 8. angle bigger than 90°
  5. 9. 10x2+10-13+5-2
Down
  1. 1. shape with 5 sides
  2. 2. something that has numbers in a circle
  3. 4. shape with a point
  4. 6. what you do if you need to add
  5. 7. to times somethink