C-13-Q021mediumsingle_mcq
A straight line is normal (perpendicular) to a plane when it is perpendicular to which of the following?
A straight line is normal (perpendicular) to a plane when it is perpendicular to which of the following?
- aonly one straight line in the plane
- bonly the boundary of the plane
- cevery straight line in the plane that meets it
- dno line in the plane