Question

I need help with my math

Answer 1

Let:

d1_2= Distance from 2nd fret to 1st fret

d2_3 = Distance from 2nd fret to 3rd fret

d1_3 = Distance from 1st fret to 3rd fret

so:

$\begin{gathered} d1_-3=d1_-2+d2_-3 \\ d1_-3=33.641\operatorname{mm}+31.749\operatorname{mm} \\ d1_-3=65.39\operatorname{mm} \end{gathered}$