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## Achievements

- idarvey's instructable Using the Concept of a Folding Rule When Teaching Students About Polygons's weekly stats:
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- idarvey's instructable A Method for Finding the Lengths of All the Diagonals of a Regular Polygon's weekly stats:
- idarvey's instructable An Alternative Approach for Finding the Number of Diagonals That Can Be Drawn in a Regular Polygon's weekly stats:
- idarvey commented on idarvey's instructable A Method for Locating the Images of an Object That Is Equidistant From Two Plane Mirrors Placed So That the Angle Between the Mirrors Is 360/N Degrees, Where N Is an IntegerView Instructable »
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- idarvey's instructable Measuring the Refractive Index of a Rectangular Glass Slab Without the Use of a Protractor.'s weekly stats:
- idarvey commented on idarvey's instructable Draw a Regular Octagon Using a Rigid Square Template, a Straight Edge and a Pencil or Pen.View Instructable »
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.