Transversal Line,, Ceva and Menelaus Theorems and Problems  Index
Ceva's theorem shines,
Lines of concurrency meet,
Triangle's essence.
Menelaus weaves his spell,
Ratio's secrets revealed.




Ceva's Theorem.
Concurrency. Interactive proof with animation. Key concept:
Menelaus Theorem. 

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


Pascal's Mystic Hexagram Theorem Proof
Transversal line. 

Pappus Theorem. Dynamic Geometry.
StepbyStep construction, Manipulation, and animation.
Transversal line. 

Angle between two
Simson Lines. Proof with animation.
Transversal line. 

Simson Line. A proof
of Simson line with animation.
Transversal line. 

Interactive Simson
Line. Dynamic Geometry.
StepbyStep construction, Manipulation, and animation.
Transversal line. 

Routh's Theorem  Index
Triangle, Cevians, Area, Ratio.
Transversal line. 

Bottema's Theorem:
Triangle and Squares with Interactive Geometry Software
StepbyStep construction, Manipulation, and animation. 

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. 

Gergonne Point Theorem. Concurrency.
Interactive proof with animation.
Key concept: Ceva's Theorem.


Nagel Point
Theorem. Proof.


Interactive
Gergonne Line and Nobbs Points.
Dynamic Geometry.
StepbyStep construction, Manipulation, and animation.
Transversal line. 

Newton's Theorem,
NewtonGauss Line: Complete quadrilateral theorem. Using TracenPoche
Dynamic Geometry Software, Online
StepbyStep construction, manipulation, and animation. 

Schiffler Point: Four Euler Lines with interactive animation and
manipulation.


Lemoine Theorem 

Complete Quadrilateral: OrtholineSteiner Line.
Using TracenPoche Dynamic Software
StepbyStep construction, Manipulation, and animation 
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