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How Many Regular Polygons Can Be Drawn Through the Points of Intersection of the Sides of Regular Star Polygons?

Using the Concept of a Folding Rule When Teaching Students About Polygons

A Method for Finding the Lengths of All the Diagonals of a Regular Polygon

An Alternative Approach for Finding the Number of Diagonals That Can Be Drawn in a Regular Polygon

Equiangular Non-regular and Cyclic Non-regular Polygons Resulting From Images Formed When an Object Is Placed Between Two Plane Mirrors That Are Not Parallel

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 Integer

Behaviour of a Refracted Ray of Light When It Touches Adjacent Sides of a Glass Prism Vs. a Water Prism

A Solution to a Problem That Arises When Studying Refraction and Total Internal Reflection in a Rectangular Glass Slab Using Two Pairs of Pins

Measuring the Refractive Index of a Rectangular Glass Slab Without the Use of a Protractor.

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.