Painting - Morley Triangle


In the late 1960s and early 1970s, the American cartoonist Crockett Johnson created a series of paintings on mathematical subjects. This oil painting, #74 in the series, dates from 1969 and is signed "CJ69." It is based on a theorem in plane geometry proved by the English-born mathematician Frank Morley (1860–1937). Morley emigrated to the United States and taught at Haverford College and Johns Hopkins University.

The painting illustrates his best-known result. It shows lines that divide the three angles of the large triangle into three equal parts. Lines coming from different vertices of the triangle meet in points. The triangle formed by joining the intersections of the trisectors, which lie nearest to the three sides of the triangle, is shown in white in the painting. According to Morley's theorem, this is an equilateral triangle.

Date Made: 1969

Painter: Johnson, Crockett

Subject: Immigration


See more items in: Medicine and Science: Mathematics, Science & Mathematics, Crockett Johnson, Art

Exhibition: NMAH Board Room Entry

Exhibition Location: National Museum of American History

Credit Line: Ruth Krauss in memory of Crockett Johnson

Data Source: National Museum of American History

Id Number: 1979.1093.48Catalog Number: 1979.1093.48Accession Number: 1979.1093

Object Name: painting

Measurements: overall: 61 cm x 64.3 cm x 3.5 cm; 24 in x 25 5/16 in x 1 3/8 in


Record Id: nmah_694672

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