Draw a triangle that satisfies this condition: the ratio of the interior angles is 7: 11: 12

The sum of the interior angles of a triangle is 180 degrees.
1.) Translating the problem into equation:
             7:11:12 = 180 degrees
      7x+11x+12x = 180 degrees; Where x = missing number
                    30x = 180
               30x/30 = 180/30 divide both sides by 30
                        x = 6
2.) Substitute the values:
       7x+11x+12x = 180
7(6)+11(6)+12(6) = 180
           42+66+72 = 180
                     180 = 180
3.) Therefore, the angles should be 42 degrees, 66 degrees and 72 degrees.
4.) See attached drawing of triangle

No because if you do the higher number minus the lower number you will get a positive. if you do it the other way around you will get a negative number