Geometric Construction-Octagon from a Square

octagon_from_squareIf you work wood sooner or later you will need to create an Octagon from a Square.  Maybe you are preparing a table leg, creating a table top or maybe a lamp base.  You may want to layout a picture or mirror frame.  There are a multitude of projects where the octagon will come into use.  There are also several ways to accomplish this task, the one I have included here is quick and accurate.

Instructional Drawing:

octagon_from_square

Greg Merritt

Jim Tolpin, one of the authors of the book “By Hand &Eye” has posted animated clips of geometric constructions on his YouTube channel.

There is also information and animations on the Math Open Reference website.

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