Copy of Orthogonal Projection on a line.

To find the Orthogonal Projection of [math]Y[/math] on the line of [math]U[/math],[br]Drag [math]\alpha U[/math] on the Line of [math]U[/math] until [math] Y-\alpha U[/math] is perpendicular to [math]U[/math].
– Abdo, יואב דביר

Information: Copy of Orthogonal Projection on a line.