Normal (geometry) Normal (geometry) In geometry, a normal is an object such as a line or vector that is perpendicular to a given object. For example, in two dimensions, the normal line to a curve at a given point is the line perpendicular to the tangent line to the curve at the point. In three dimensions, a surface normal, or simply normal, to a surface at a point "P" is a vector that is perpendicular to the tangent plane to that surface at "P". The word "normal" is also used as an adjective: a line normal to a plane, the normal component
A Is for Answers that Spencer did not hurt her. After telling them about what happened that night, all the girls are attacked by what appears to be "A" and they run up to the roof. (Ian Harding) comes up just as “A” reaches them and claims to know who “A” is but “A” does not seem to care. He and “A” struggle for the gun, which is dropped in the struggle. Hanna picks it up and threatens the masked person at gunpoint to take off the mask. “A” pretends to reach for the mask, then jumps over to the next building and leaves