Answer :
Answer: [tex]60^{\circ}[/tex]
Step-by-step explanation:
Given
Andy wants to turn [tex]180^{\circ}[/tex] on his skateboard
Currently, he can make a turn of [tex]120^{\circ}[/tex]
The difference between the required and current turn degree meets his goal i.e.
[tex]\Rightarrow 180^{\circ}-120^{\circ}\\\Rightarrow 60^{\circ}[/tex]
Thus, he needs to turn by [tex]60^{\circ}[/tex] to meet his goal