Math about triangle and plus

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Across
  1. 3. with the addition of
  2. 8. a triangle whose three sides are all the same length
  3. 9. 9>8
  4. 10. a quartifier meaning great in size or amount or extent or degree
  5. 11. A number to be added to another
Down
  1. 1. a triangle whose sides are each a different length
  2. 2. a triangle in which two of the sides are the same length
  3. 4. the total amout resulting from the addition of two or more numbers
  4. 5. a triangle which has an angle of 90 degree
  5. 6. 5>3
  6. 7. 7>2
  7. 11. put together