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Plane Geometry
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Demonstrations 61  80 of 1075
Halving a Triangle Perimeter
The BanachTarski Paradox
Tetrads
Hinged Dissections: From Three Squares to One
Set Operations on Regions
NonEuclidean Triangle Continuum
Intersecting Circles
Doubling a Distance with a Compass
Neat Alternating Tilings of the Plane
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
Hirano's Construction of a Regular Pentagon
Making the Three Areas Defined by Congruent Overlapping Circles Equal
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