|
Classical Theorems - Page 1
|
 |
|
 |
Dynamic Geometry 1478.
Cyclocevian, Reuschle-Terquem Theorem, Concurrent Cevians, Triangle, Circumcircle, Secant line, Step-by-step Illustration. GeoGebra,
iPad. |
 |
Dynamic Geometry 1477.
Miquel's Pentagram Theorem, Pentagon, Triangle, Circumcircles, Concyclic Points, Step-by-step Illustration. GeoGebra,
iPad. |
 |
Dynamic Geometry 1476.
Droz-Farny Line Theorem, Triangle, Orthocenter, Perpendicular, Collinear Midpoints, Step-by-step Illustration. GeoGebra,
iPad. |
 |
Dynamic Geometry 1475.
Clifford Intersecting Circles Theorem, Step-by-step Illustration, GeoGebra, iPad. |
 |
Dynamic Geometry 1474.
Butterfly Theorem, Circle, Chords, Midpoints, Step-by-step Illustration. |
 |
Dynamic Geometry 1473.
Kosnita's Theorem, Triangle, Four Circumcenters, Concurrent Line, Step-by-step Illustration. |
 |
Dynamic Geometry 1468.
Steiner's Theorem, Triangle, Circumradius, Inradius, Sum of Exradii, Step-by-step Illustration. |
 |
Geometry Problem 1466.
Tangential Quadrilateral, Newton Line, Incenter, Midpoint, Diagonal, Collinear Points.
Step-by-step Illustration using GeoGebra. |
 |
Geometry Problem 1462.
Newton-Line, Newton-Gauss Line, Complete Quadrilateral, Midpoints of Sides and Diagonals,
Collinear Points. Step-by-step Illustration using GeoGebra. |
 |
Dynamic Geometry
1460.
Newton-Gauss Line, Complete Quadrilateral, Midpoints of Diagonals,
Collinear Points, Step-by-step Illustration using GeoGebra. |
 |
Geometry
Problem 1455.
Nagel Point, Excircles, Incircle, Congruent Segments,
iPad. Step-by-step illustration using GeoGebra. |
 |
Dynamic Geometry 1452.
Japanese Theorem, Sangaku,
Cyclic Quadrilateral, Incenter, Rectangle, Inradius. Step-by-step
illustration using GeoGebra. |
 |
Dynamic Geometry 1451.
Orthopole of a Line. Step-by-step
illustration using GeoGebra. |
 |
Dynamic Geometry 1450.
Ortholine, Steiner Line, Complete Quadrilateral, Collineal Orthocenters. Step-by-step
illustration using GeoGebra. |
 |
Dynamic Geometry 1449.
Salmon Line. Step-by-step
illustration using GeoGebra. |
 |
Dynamic Geometry 1448.
Simson Line. Step-by-step
illustration using GeoGebra. |
 |
Dynamic Geometry Problem 1447.
Outer Vecten Point. Step-by-step
illustration using GeoGebra. |
 |
Dynamic Geometry Problem 1446.
Lemoine Line, triangle, circumcircle, tangent, collinear points. Step-by-step animation using GeoGebra. |
 |
Dynamic Geometry Problem 1444.
The Asymmetric Propeller Theorem, Equilateral Triangles, Midpoints. Step-by-step animation using GeoGebra. |
 |
Pythagorean Theorem.
|
 |
Euclid's Elements Book II, Proposition 12: Law of Cosines.
|
 |
Euclid's Elements Book II, Proposition 13: Law of Cosines.
|
 |
Median
length, Apollonius' Theorem |
 |
The significance of the Pythagorean theorem by Jacob
Bronowski.
Pythagorean Theorem, 47th Proposition of Euclid's Book I. |
 |
Carnot's Theorem. Geometry Problem 889
Carnot's Theorem in an acute triangle, Circumcenter, Circumradius, Inradius. GeoGebra, HTML5 Animation for Tablets. |
 |
Ceva's Theorem.
Concurrency. Interactive proof with animation. Key concept:
Menelaus Theorem. |
|
Menelaus' Theorem. Interactive proof with
animation and key concepts..
|
 |
van Aubel's Theorem.
Quadrilateral with Squares. Proof with animation. |
 |
van Aubel's Theorem.
Quadrilateral with Squares. Proof with animation for Tablets, iPad,
Nexus, Galaxy. |
 |
Dynamic Geometry Problem 1445.
Van Aubel's theorem, Quadrilateral and Four Squares, Centers. Step-by-step animation using GeoGebra. |
 |
Heron's Formula.
Key facts and
a purely geometric
step-by-step proof.
|
 |
Euclid's Elements
Book I, 23 Definitions. One-page visual illustration.
Euclid's Elements Book.
Index |
 |
Euclid's Elements Book VI, Proposition 3: Angle Bisector Theorem |
 |
Euclid's
Elements, Book XIII, Proposition 10 One page visual illustration. |
 |
Ptolemy's Theorem.
|
 |
Dynamic Geometry: Brahmagupta Theorem,
. GeoGebra, HTML5 Animation for Tablets |
 |
Brianchon's Theorem in a Circumscribed Hexagon. |
 |
Brianchon Corollary, Circumscribed Hexagon, Concurrency lines. |
 |
Carnot's
Theorem in an Acute Triangle. |
 |
Carnot's
Theorem in an Obtuse Triangle. |
 |
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.
|
 |
Cyclic
Quadrilateral: Ratio of the Diagonals
|
 |
Nine-Point Center, Nine-Point Circle, Euler Line.
Interactive illustration.
|
 |
Soddy
Circles and Descartes Theorem.
Three tangent circles, Inscribed and Circumscribed Circles, Radii. |
 |
Euler's Problem, Problem 155. Distance between the Incenter to the Circumcenter. |
 |
The Simson Line, Theorems
and Problems - Index. |
 |
Casey's Theorem. Generalized Ptolemy's Theorem.
|
 |
Brahmagupta's Formula
Area of a cyclic quadrilateral.
|
 |
Brahmagupta's Theorem
Cyclic quadrilateral.
|
 |
Platonic
Solids, Interactive animation.
HTML5 Animation for iPad and Nexus
Flash Animation. |
 |
Theaetetus' Theorem, Platonic Solids, Interactive animation |
Go to Page:
Previous |
1 |
2 |
3 |
4 |
5 |
Next
|