# Write the condition of parellelism of a line and a plane.

SHAIK AASIF AHAMED
8 years ago
If a line is parallel to a plane then it is perpendicular to the normal to the plane
suppose$\Theta$is the angle between the line $\underset{r}{\rightarrow}=a+\lambda\underset{b}{\rightarrow}$and the plane$\underset{r}{\rightarrow}.\underset{n}{\rightarrow}=d$then condition of parallelism is$\underset{b}{\rightarrow}.\underset{n}{\rightarrow}=0$
Thanks and Regards
Shaik Aasif