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Honorary Associate, School of Life and Environmental Sciences, The University of Sydney
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- idarvey commented on idarvey's instructable Draw a Regular Octagon Using a Rigid Square Template, a Straight Edge and a Pencil or Pen.5 months ago
- idarvey's instructable Given Any Rigid Regular Polygon, Draw a Regular Polygon With Double the Number of Sides Using Only the Rigid Regular Polygon, a Straight Edge and a Pen or Pencil.'s weekly stats: 6 months ago
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- idarvey posted an instructable Draw a Regular Octagon Using a Rigid Square Template, a Straight Edge and a Pencil or Pen.10 months ago
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- idarvey's instructable Construct a Regular Tetrahedron From Two Pairs of Congruent Non-regular Tetrahedra Which Are Mirror Images of Each Other's weekly stats: 2 years ago
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- idarvey posted an instructable Construct a regular tetrahedron from congruent non-regular tetrahedra 2 years ago
- idarvey posted an instructable Making a Transparent Regular Tetrahedron for Studying Solid Geometry3 years ago
The proceduredescribed in this Instructables was ageometry problem in recreational mathematics where one imagines that one only hasthe items that were listed in the requirements in order to carry out theproposed problem.The usualproblem that involves drawing an octagon given a square allows the use of acompass (see for example: http://tgbasics.weebly.com/how-to-construct-an-octagon-in-a-square.htmlor http://tgbasics.weebly.com/how-to-construct-an-octagon-in-a-square.html).The requirement of a rigid square in this Instructableswas used so that one couldn’t carry out the procedure by folding the square alongits two diagonals, thus providing a length equal to half the length of thediagonal, which then allows the ready construction of an octagon.