math vocab

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Across
  1. 5. a plane figure with six straight sided
  2. 6. out of something
  3. 10. plane figure with nine straight sides
  4. 11. the opposite of division
  5. 12. 90 degrees
Down
  1. 1. figure with at least three straight sides
  2. 2. the opposite of adding
  3. 3. a shape with five straight lines
  4. 4. for every hundred
  5. 7. the total amount of adding
  6. 8. smaller than right angle
  7. 9. never ending