Question

When a straight line is perpendicular to a plane?

Answer 1

Answer:

It is perpendicular when it cross each other.

Step-by-step explanation:

Answer 2

$\huge\boxed{\fcolorbox{cyan}{Grey}{HeLLo MaTe..!!}}$

When a line is perpendicular to two lines on the plane (where they intersect), it is perpendicular to the plane. It will also be perpendicular to all lines on the plane that intersect there.