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Demonstrations 141 - 160 of 3202
Two Equidecomposable Triangles
Parallelepiped with Edges on Three Skew Lines
Spherical Right Triangles
Spherical Cap and Ring
Intersection of a Plane and a Tetrahedron
Completing a Tetrahedron to a Parallelepiped
Dissection of a Spherical Triangle into Three Spherical Triangles around a Spherical Hexagon
Four Theorems on Spherical Triangles
Dissection of Three Regular Spherical Pentagons into Five Equilateral Spherical Triangles
Dissection of a Spherical Equilateral Triangle into Three Isosceles Triangles
Relations between Plane Angles and Solid Angles in a Trihedron
Supplementary Solid Angles for Trihedron
Swing-and-Twist Hinged Dissection of One Regular Heptagon into Seven
Regular Spherical Polygons
Regular Tetrahedra Formed by Lattice Points Equidistant from the Origin
Convergent Series of Rectangles to Fill a Unit Square
Joukowski Airfoil: Geometry
Euclid's Formula and Properties of Pythagorean Triples
Tracing a Cyclogon: Roulette of a Polygon Rolling along a Line
Tracing a Peritrochoid
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