Definitions for "Diagonals"
Keywords:  trot, rider, hindleg, pacer, foreleg
A normal horse (as opposed to a pacer, who trots laterally) trots diagonally, i.e., his near (left) fore and off (right) hind move forward at the same time, followed by his off fore and near hind. If the rider rises in the saddle at the moment the near fore is going forward, he is said to be on the left diagonal; if he rises as the off fore is going forward, he is on the right diagonal. The rider should alternate the diagonal he rises on so as to share the work load evenly; in this way the chances of one side of the horse stiffening are minimized. (You should also switch the side you rise to on a pacer.)
Movements that test the coordination of the rider's posting and up-down motion with the diagonal movement of the horse's legs while trotting.
The horses legs move in pairs at the trot, called diagonals. The left diagonal is when the left foreleg and right hindleg move, the right diagonal is when the right foreleg and the left hindleg move. When on a circle, the rider rises as the outside foreleg moves forward.
Keywords:  crate, cleat, braces, rigidity, angles
Frame or cleat members positioned between parallel frame members and placed at angles of nearly 45 degrees to them. Diagonals serve as braces to insure rigidity in the crate or box.
lines used in the subdivision of divisions of an arc, also known as transversals. Each diagonal line is drawn across the division from its beginning to its end, and is divided linearly either by dots or by concentric arcs. In this way the linear division of a line can be used for the angular subdivision of an arc.
Keywords:  perfect, see
See perfect diagonals.