As a noun shoe
is a protective covering for the foot, with a bottom part composed of thick leather or plastic sole and often a thicker heel, and a softer upper part made of leather or synthetic material shoes generally do not extend above the ankle, as opposed to boots, which do.
As a verb shoe
is to put shoes on one's feet.
As a proper noun triangle is
the area comprising the cities of used with "the" except when attributive.