An ordinary "indented" is bounded by small zigzags like a triangle wave, with peaks on one side matching peaks on the other. An ordinary "dancetty" is similar, but with peaks matching troughs, so that the width is constant; it also typically has fewer points than "indented". In early armory these were not distinguished. In the arms of the 55th Electronic Combat Group of the United States Air Force the indented is "edged wider on the back angle (sinister) than on the face (dexter) of each angle".