Math about triangle and plus

Edit Answers
1234567891011
Across
  1. 2. the total amout resulting from the addition of two or more numbers
  2. 3. put together
  3. 4. a quartifier meaning great in size or amount or extent or degree
  4. 9. a triangle in which two of the sides are the same length
  5. 10. a triangle which has an angle of 90 degree
  6. 11. 5>3
Down
  1. 1. a triangle whose three sides are all the same length
  2. 3. A number to be added to another
  3. 5. a triangle whose sides are each a different length
  4. 6. 7>2
  5. 7. with the addition of
  6. 8. 9>8