Math Crossword

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Across
  1. 4. parallelogram with 4 equal sides
  2. 6. number by which a dividend is divided
  3. 8. front of the number
  4. 10. difference between the two number
  5. 11. total of two numbers
  6. 12. triangle：three line are equal
Down
  1. 1. triangle:a triangle with no two sides of equal length
  2. 2. triangle:a triangle with two equal sides
  3. 3. quotient of 80 divided by 2 is 40
  4. 5. total number
  5. 7. quadrilateral with two parallel sides
  6. 9. triangle:a triangle with one right angle