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Geometry
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Demonstrations 2361  2380 of 3204
Miter Joint and Fold Joint
Mitering a Closed 3D Path
A Parabolic Mirror
Dissecting a Regular Triangle into Three Similar Tiles
Broken Heart Tangram (Variation)
Point in Triangle
A Polygon That Folds into a Regular Tetrahedron or into a Rectangular Box
Inscribed and Central Angles in a Circle
14Piece Dissection of Juel's Pyramid into a Parallelepiped
Dissecting a Square Pyramid into 15 Pieces
A Net That Folds into an Icosahedron or into a Double Biaugmented Triangular Prism
Triangle Interior
The Triangle Formed by the Centers of the Miquel Circles
Projections of Midpoints onto Circumradii
Zonogons: Minkowski Sums of Line Segments in 2D
The Sum of the Reciprocals of the Exradii
The Product of the Inradius and Three Exradii
The Distance from the Circumcenter to an Excenter
The Product of the Circumradius and an Exradius
Another Relation between the Areas of Triangles Associated with an Excircle
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