Answer:
We know that a triangle has angles that equal to 180°
[tex]45 + x + 77 + x + 72 = 180 \\ 194 + 2x = 180 \\ 2x = 180 - 194 \\ 2x = - 14 \\ x = - 7[/tex]
A= x+72
=-7+72
=65°
