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Demonstrations 221  240 of 353
Total Areas of Alternating Subtriangles in a 2ngon
Equilateral Triangles That Form a Star
Reciprocals of Diagonal Lengths in the Regular Polygon of Unit Side
Beraha's Conjecture, Wheels, and Cyclic Graphs
An Efficient Test for a Point to Be in a Convex Polygon
Areas of Parallelograms and Trapezoids
Two Hinged Dissections
Théorème de Pappus (French)
Products of Diagonal Lengths in the Regular Polygon
Tiles with Finite Convex Spectra
A Cyclic Quadrilateral Concurrency
A Parallelogram with Vertices on Two Circles
Area of a Hexagon Formed by the Vertices and Altitude Extensions of a Triangle
Recursively Defined Partial Tilings of the Plane
Ammann Tiles
Voronoi Kaleidoscope
Dual Billiards
Miter Joint and Fold Joint
Mitering a Closed 3D Path
Point in Triangle
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