The guassian curvature of a surface is $\displaystyle (LM - N^2) / (EG - F^2)$. Basically

i am doing a question where i found that $\displaystyle (EG - F^2)=0$ , so i got $\displaystyle (LN - M^2)/ 0 $.

i was wondering if anyone knows what this means for guassian curvature or the surface as it is divided by zero.