# Construction Of A Pentagon On A Line

## Description

An illustration showing how to construct a pentagon on a given line without resort to its center. "From B erect Bo perpendicular to and equal to AB; with C as center and Co as radius, draw the arc Do, then AD is the diagonal of the pentagon. With AD as radius and A as center, draw the arc DE; and with E as center and AB as radius, finish the cross E, and thus complete the pentagon."

## Keywords

construct, geometric construction, geometry, pentagon, pentagon on a line

## Galleries

## Source:

Albert A. Hopkins *Scientific America: Handy Book Of Facts And Formulas* (New York: Munn & Co., Inc., 1918) 37

Courtesy the private collection of Roy Winkelman