Dynamic Geometry 1449: Salmon Line

Interactive step-by-step animation using GeoGebra. Post your solution in the comment box below.
Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.

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Dynamic Geometry Problem 1445: Van Aubel's theorem, Quadrilateral and Four Squares, Centers

Interactive step-by-step animation using GeoGebra. Post your solution in the comment box below.
Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.

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Geometry Problem 1393: Monge's Circle Theorem, Three Circles and Three Pair of Common Tangents, Collinearity

Geometry Problem. Post your solution in the comment box below.
Level: Mathematics Education, High School, Honors Geometry, College.

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Geometry Art of Problem 501, Finsler Hadwiger theorem. Triangle, Squares, Drawing, Sketch. Computer, Tablet, iPad

Computer, Tablet, iPad Apps, Software.

Details: Click the figure below.

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Apollonius Theorems and Problems

Index
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to open the index.

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Gergonne Point Theorem. HTML5 Animation for iPad and Nexus

HTML5 Animation for iPad and Nexus
Click the figure to open the interactive illustration.

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Lines, Theorems and Problems, Index

Plane Geometry
Level: Mathematics Education, High School, College.

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Theorems, Interactive Mind Map

Interactive Mind Map
Graphic organizers are visual representations of knowledge, concepts or ideas.

Click the figure below to see Theorems, Interactive Mind Map.

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Puzzle based on the Kosnita's Theorem: Circumcenters, Concurrent lines

Interactive Puzzle
Click the figure to solve the interactive puzzle about the Kosnita's Theorem: Circumcenters, Concurrent lines



See also:
Puzzle: Kosnita's Theorem

Archimedes' Book of Lemmas

Index.
According to "The Works of Archimedes" by T. L. Heath, Cambridge 1897, Archimedes' works included "On the Sphere and Cylinder", "On the Measurement of a Circle", "On Conoids and Spheroids", "On Spirals", "On the Equilibriums of Planes", "The Sand-reckoner", "Quadrature of the parabola", "On Floating Bodies", "Book of Lemmas" and "The Method".



In the book "Book of Lemmas", attributed by Thabit ibn-Qurra to Archimedes, there were 15 propositions on circles, with the first proposition referred in the subsequent fifth and sixth propositions. The statements in "Book of Lemmas" do not seem to concur to a central theme.

Continue reading at:
gogeometry.com/ArchBooLem00.htm