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Triangles
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Demonstrations 1 - 20 of 420
Expanding Triangles ArtThe Excentral Triangle and a Related HexagonFour Concyclic PointsCross's TheoremA Concurrency from Midpoints of Arcs of the Circumcircle
Expanding Triangles Art
New this week
The Excentral Triangle and a Related Hexagon
Four Concyclic Points
Cross's Theorem
A Concurrency from Midpoints of Arcs of the Circumcircle
A Concurrency of Lines through Points of Tangency with ExcirclesEquilateral Triangles in 3D with Integer CoordinatesArbitrary Curves of Constant WidthSpherical Triangle SolutionsA Concurrency from Six Pedal Points
A Concurrency of Lines through Points of Tangency with Excircles
Equilateral Triangles in 3D with Integer Coordinates
Arbitrary Curves of Constant Width
Spherical Triangle Solutions
A Concurrency from Six Pedal Points
Dissecting an Equilateral Triangle into Four Equilateral TrianglesGarfield's Proof of the Pythagorean TheoremDudeney's Proof of the Pythagorean TheoremSum of Medians Divided by the PerimeterPrimitive Pythagorean Triples on a Curvilinear Grid Defined by Euclid's Formula
Dissecting an Equilateral Triangle into Four Equilateral Triangles
Garfield's Proof of the Pythagorean Theorem
Dudeney's Proof of the Pythagorean Theorem
Sum of Medians Divided by the Perimeter
Primitive Pythagorean Triples on a Curvilinear Grid Defined by Euclid's Formula
Cylinder Area ParadoxAngle and Length Measurement of a PolygonNine-Point CircleParallelogram Dissection ParadoxSine, Cosine, and Tangent Using Ratios of Sides of a Right-Angled Triangle
Cylinder Area Paradox
Angle and Length Measurement of a Polygon
Nine-Point Circle
Parallelogram Dissection Paradox
Sine, Cosine, and Tangent Using Ratios of Sides of a Right-Angled Triangle

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