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Plane Geometry
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Demonstrations 1  20 of 1022
Irreptiles
Updated this week
NonEuclidean Triangle Continuum
Updated this month
Repeatedly Subdividing Triangles through Special Points
New this month
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
Tiles with Finite Convex Spectra
Japanese Theorem for Cyclic Polygons
Irregular Tilings
Tetrads
Hirano's Construction of a Regular Pentagon
Making the Three Areas Defined by Congruent Overlapping Circles Equal
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