Move the points A and B to choose your vectors. Click on "Show Projection" to see the projected vector of a onto b using both algebraic and geometric methods.[br]Note the calculation shows us how to find the projected vector using their cartesian definition.[br]Note the picture displays how to find a projection geometrically by constructing a line perpendicular to b that crosses the tip of a.[br]You can think of the projected vector as the vector a's shadow on b.