Math Crosword

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Across
  1. 2. 180degrees
  2. 5. Multipi Lenth x with
  3. 6. Addition of all the sides
  4. 7. 5x15=?
  5. 8. less than 180 degrees more than 90
  6. 10. it have 6 sides
  7. 11. Right Angle
Down
  1. 1. Operation all together
  2. 2. it have 0 sides
  3. 3. Alltogether
  4. 4. it have 8 equal sides
  5. 9. it have 4 equal sides wich shape it is?