Math crossword

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Across
  1. 3. result of numbers being multiplied
  2. 4. a figure with 3 straight lines and angles
  3. 6. when rates are expressed as a quantity of 1
  4. 8. a straight line passing through a circle
  5. 9. a whole number
  6. 10. the numbers that come after zero
Down
  1. 1. when you add two numbers
  2. 2. the space between two meeting lines
  3. 3. two lines or figures that will never touch
  4. 5. the numbers that come before zero
  5. 7. a figure with three straight sides and three angles
  6. 11. the number in the middle of numbers