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Plane Geometry
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Demonstrations 21  40 of 1080
Olympic Logos Based on Hanegraaf's Dissection of a Dodecagon to Five Dodecagons
Another Hinged Dissection of One Pentagon to Five Pentagons
Logos Based on a Dissection of One Pentagon to Five Pentagons
Freese's Dissection of Four Equilateral Triangles into One
Designs Based on Dissecting Regular Polygons into Rhombuses
Variations of Logos of Tokyo 2020 Olympic and Paralympic Games
Logos of Tokyo 2020 Olympic and Paralympic Games
Irreptiles
Pál Joints
Ray Tracing for Points in a Polygon
Draw Polygons on Grids
Rational Distance Problem
Coupler Curve Atlas for the FourBar Linkage
Some Irreptiles of Order Greater than 20
Rectangles Reasonably Close to a Given Area
Triangle Radicals
Polar Curve Generator with FiveBar Linkage
An American High School Mathematics Examination Question
Congruence Classes of Geoboard Triangles
Triangle Altitudes and Circumradius
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