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Plane Geometry
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Demonstrations 1241 - 1260 of 1465
Bankoff Circle
Ptolemy's Theorem
Euclid's Proof of the Pythagorean Theorem
Miquel's Pentagram Theorem
Covering the Plane with Polygons
Simson's Theorem
Johnson's Theorem
Five-Squares-to-One Dissection
The Perpendicular Bisector of a Chord
Stengel's Theorem
Pedal Triangles of Isogonal Conjugates
Hinged and Translational Dissection of Two Squares to One
Circular Coverings
The Carpets Theorem
The Midpoint Quadrilateral Theorem
The Two Triangles Theorem
Euler's Theorem for Pedal Triangles
A Theorem about Two Tangent Circles
Crossed Ladders Theorem
Distances from the Centroid
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