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Plane Geometry
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Demonstrations 1  20 of 1026
Repeatedly Subdividing Triangles through Special Points
Updated this month
Halving a Triangle Perimeter
New this month
Irreptiles Database
The BanachTarski Paradox
Tetrads
Hinged Dissections: From Three Squares to One
Set Operations on Regions
Irreptiles
NonEuclidean Triangle Continuum
Intersecting Circles
Doubling a Distance with a Compass
Neat Alternating Tilings of the Plane
Draw Polygons on Grids
Trisecting an Angle Using the Cycloid of Ceva
Triangulating Random and Regular Polygons
Wheel Graphs with Integer Edges
Tangent Circles to Two Parallel Lines and Passing through a Point
Ratios of the Areas of an Internal Hexagon to Its Star to the External Hexagon
Enlargement in Two Dimensions
Triangle Altitude
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