A unit vector has a length (magnitude) equal to 1 (one unit). A rectangular vector is a coordinate vector specified by components that define a rectangle (or rectangular prism in three dimensions, and similar shapes in greater dimensions). The starting point and terminal point of the vector lie at opposite ends of the rectangle (or prism, etc.).
a vector with nothing in it
A resultant vector is one vector which can replace all the other vectors and produce the same effect.
It is a measure which has a direction as well as a value.
i had 2 change what i thought
It stands for gradient vector flow.
The 'orthcentre' of a triangle is at the point where the 3 perpendicular altitudes intersect within the triangle.
If you meant right angle then yes
The dimensions of a rectangular plot are its length and width.
A negative vector is a vector that has the opposite direction of the original vector but the same magnitude. It is obtained by multiplying the original vector by -1. In other words, if the original vector points in a certain direction, the negative vector points in the exact opposite direction.
If equelatiral is meant to be equilateral, then it is a triangle whose three sides are of equal length.
A force is a vector - in two dimensions, you can represent it on paper as an arrow. Such vector/arrows have a size, and a direction. The size is usually called the "magnitude".