Painting - Heptagon 1:3:3 Triangle

  • images for Painting - <I>Heptagon 1:3:3 Triangle</I>-thumbnail 1
  • images for Painting - <I>Heptagon 1:3:3 Triangle</I>-thumbnail 2
This painting is part of Crockett Johnson's exploration of the properties of the heptagon, extended to include a 14-sided regular polygon. The design of the painting is shown in his figure, which includes many of the line segments in the painting. Here Crockett Johnson argues that the triangle ABF in the figure is the one he sought, with angle FAB being one seventh of pi. Segment CD in the figure, which appears in the painting, is the length of the edge of a regular 14-sided figure inscribed in a portion of the larger circle shown.
The painting, of oil or acrylic on masonite, is number 105 in the series. It is drawn in shades of cream, blue, and purple on a light purple background. It has a metal frame and is unsigned.
Currently not on view
National Museum of American History
Johnson, Crockett
Credit Line
Ruth Krauss in memory of Crockett Johnson
Physical Description
masonite (substrate material)
metal (frame material)
overall: 77 cm x 41 cm x 2.5 cm; 30 5/16 in x 16 1/8 in x in
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Crockett Johnson
ca 1973
Object Name
ID Number
catalog number
accession number