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Paper with text and a drawing of a triangle on a blue background

PD12M

Paper with text and a drawing of a triangle on a blue background

The image shows a paper with text and a drawing of a triangle on a blue background.

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The image shows a paper with text and a drawing of a triangle on a blue background. The triangle is composed of several points connected by a line, and the text on the paper provides further information about the triangle.

Credit: National Museum of American History
License: https://creativecommons.org/publicdomain/zero/1.0/

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