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Recent Additions (Page 78 of 80)






Menelaus' Theorem. Interactive proof with
animation and key concepts. 


Triangle
with the bisectors of the exterior angles. Collinearity. Key
concept:
Menelaus Theorem.



Napoleon's Theorem. A purely geometric proof.
It uses the Fermat point to prove Napoleon without transformations.



Morley's Theorem. Introduction with animation.
Triangle + Trisectors = Equilateral triangle.



Morley's Theorem Puzzle: 22
pieces of polygons. 


Sierpinski
Triangle and Machu Picchu. Fractal illustration with animation.



Sierpinski Triangle and
Machu Picchu. Puzzle. 


Monge &
d'Alembert Three Circles Theorem II with Dynamic Geometry
You can alter the geometric construction dynamically in order to test
and prove (or disproved) conjectures and gain mathematical insight that
is less readily available with static drawings by hand. Requires
Java Plugin 1.3 or higher. Please be patient while the applet loads
on your computer. If you are using a dialup connection, it may take a
few minutes but is well worth the wait. Cabri, GSP, Cinderella,
C.a.R. 


Monge &
d'Alembert Three Circles Theorem I with Dynamic Geometry
You can alter the geometric construction dynamically in order to test
and prove (or disproved) conjectures and gain mathematical insight that
is less readily available with static drawings by hand. Requires
Java Plugin 1.3 or higher. Please be patient while the applet loads
on your computer. If you are using a dialup connection, it may take a
few minutes but is well worth the wait. Cabri, GSP, Cinderella,
C.a.R. 


Miquel's
Pentagram with Dynamic Geometry. You can alter the pentagram
dynamically in order to test and prove (or disproved) conjectures and
gain mathematical insight that is less readily available with static
drawings by hand. Requires Java Plugin 1.3 or higher. Please
be patient while the applet loads on your computer. If you are using a
dialup connection, it may take a few minutes but is well worth the wait.
Cabri, GSP, Cinderella, C.a.R. 


Inca Quiz. Ten questions in random order.



Puzzle of The Raft of the Medusa: 91 pieces of lizards
tessellation.
Languages: English,
Spanish
and
Traditional Chinese. 


The Lord of Sipan and Geometric Art randomly generated with
animation.



On Children a
poem by Kahlil Gibran. 


The Road Not Taken.
Robert Frost's poem about choices and decision making.
Spanish version



The Road Not Taken Puzzle.
Robert Frost's poem, puzzle 48 pieces of USA map. 


Machu Picchu and Geometric Art
randomly generated with animation. 


Miquel's Pentagram Theorem
Interactive proof with animation and key theorems.



Clifford's Circle Chain
Theorems. This is a step by step presentation of the first theorem.
Clifford discovered, in the ordinary Euclidean plane, a "sequence or
chain of theorems" of increasing complexity, each building on the last
in a natural progression.



Parallelogram with Squares theorem Thébault's Theorem.

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