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Demonstrations 101  120 of 167
Idealized Galton Board
Joule's Experiment
Foucault's Pendulum
Inscribed and Central Angles in a Circle
Distance between Two Points
Angle Bisector Theorem
Pythagorean Triangles with the Same Area
Colorcoded Country Comparison
Particles Thrown from a Rotating Bar
Proposition 3, Book XII, Euclid's Elements
Any Triangle Can Tile
A Lemma of Archimedes about a Bisected Segment
Tangent Points on a Semicircle
Tangent Circles and Parallel Diameters
Perpendiculars to a Chord
Proof of Proposition 28, Book XI, Euclid's Elements
Ptolemy's Theorem
Euclid's Proof of the Pythagorean Theorem
Click a Country
The Perpendicular Bisector of a Chord
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