SIMILITUDE

, in Arithmetic and Geometry, denotes the relation of things that are similar to each other.

Euclid and, after him, most other authors, demonstrate every thing in geometry from the principle of congruity. Wolfius, instead of it, substitutes that of Similitude; which, he says, was communicated to him by Leibnitz, and which he finds of very considerable use in geometry, as serving to demonstrate many things directly, which are only demonstrable from the principle of congruity in a very tedious manner.