Pentagon Elevation and Projection Scaling

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“DE being chosen as an isometric line or axis, a second axis, YY, is drawn isometrically perpendicular to it. Points C and F lie on this axis, and their position is readily determined, since measurements may be made on this line. As line AB, drawn through C, is an isometric line, points A and B may be located at their proper distances to the right and left of the axis YY.” —Anthony, 1904

Source

Anthony, Gardner C. Elements of Mechanical Drawing (Boston, MA: D. C. Heath & Co., 1904)

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