Question

what is perpendiculum​

Answer 1

Hello !!

The Answer is :

Perpendicular means "at right angles". A line meeting another at a right angle, or 90° is said to be perpendicular to it. In the figure above, the line AB is perpendicular to the line DF. If they met at some other angle we would say that AB meets DF 'obliquely'.

Answer 2

perpendicular is at an angle of 90 ° to something..