“A year earlier , Indiana had essayed his first Polygons, ten paintings from Triangle to Duodecagon, the numerals appearing within lettered circles of private and poetic associations. There are numerals within the polygons, but unlike the classic figure 5 in the American Dream, the numerals, in several styles and sizes, are quaint and romantic. The paintings are bright and colorful, childlike in delight in alliteration and repetition of word and color. ‘Tintinabulation’ says the Triangle. ‘Quare Quadrangle’ says the Square. ‘Particci Pentagon’ says the Pentagon.”
— William Katz
“Robert Indiana,” Currant 1 (December 1975–January 1976), p. 53.