Answer:
31°
Step-by-step explanation:
Given Angle EFG = Angle EFH + Angle HFG (based on the diagram)
[tex]2x+52 = 21 + (x+31)\\2x+52 = 21+x+31\\2x+52=x+52\\2x-x+52=52\\x+52=52\\x=52-52\\x=0[/tex]
From here we can see the value of x is non-existent.
Substitute x to find Angle HFG.
x+31 = 0 + 31 = 31°
