Respuesta :

sqdancefan

Answer:

  x = 34

Step-by-step explanation:

The figure will be a rhombus if the diagonals cross at right angles. That is ...

  (3x -12)° = 90°

  3x = 102

  x = 34

The figure is a rhombus when x=34.

Answer:

34

Step-by-step explanation: