+73 angle 1 would just be 24, because all the triangles inside the rhombus are congruent.
angle 2 would be 90, because the diagonals of a rhombus are perpendicular (if you would like proof, i believe Khan Academy has a video on that).
angle 3 would be 180 - (90 + 24) = 180 - 114 = 66.
hope this helped! please let me know if you are still confused or have any questions :)
