# Construction Of An Isometric Ellipse

## Description

An illustration showing how to construct an isometric ellipse by compass and six circle arcs. "Divide OA and OB each into three equal parts; draw the quadrant AC. From C, draw the line Cc through the point 1. Through the points 2 draw de at an angle of 45° with the major axis. Then 2 is the center for the ends of the ellipse; e is the center for the arc dc; and C is the center for the arc cf."

## Keywords

circle arcs, compass, construct, geometric construction, geometry, isometric ellipse

## 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