Question

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

Answer 1

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