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Triangles and Other Polygons
1 - 5
A growing collection of over 1000 virtual reality polyhedra to explore, complementing Hart's
Pavilion of Polyhedreality.
Includes instructions for building
paper models of polyhedra
including modular origami, with ideas...
AMOF: The Amazing Mathematical Object Factory
Combinatorial objects are everywhere. How many ways are there to make change for $1 using unlimited numbers of coins of all denominations? Each way is a combinatorial object. AMOF is part encyclopedia and part...
The Many Ways to Construct a Triangle
In general, a triangle is defined by its three elements. SAS, ASA, and SSS provide three well-known examples but there are many more. Bogomolny provides a table of constructions (linked to constructions) and invites...
Encyclopedia of Triangle Centers
A searchable catalogue of hundreds of special triangle points (centroid, incenter, Hofstadter points, Yff centers, Apollonius point, etc.), with a glossary, collinearities, graphics, and links to biographical sketches...
A listing, with description and illustration, of 20th-century triangle centers (including: Schiffler Point, Exeter Point, Parry Point, congruent isoscelizers point, Yff Center of Congruence, isoperimetric point and...
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