Online Geometry: Triangles, Theorems and Problems

Online Geometry

Triangles Theorems and Problems- Page 2

Triangles

Second Fermat Point

Second Fermat Point: Static diagram.
Second Fermat Point: Dynamic diagram.
Triangle, Equilateral triangles, Concurrent lines, GeoGebra, HTML5 Animation for Tablets (iPad, Nexus)

Triangle with Double Angle

Triangle with Double Angle, Theorems and Problems, Index
 

Napoleon Theorem and Problem Index

Napoleon's theorems and problems, Index.

The Simson Line Index

The Simson Line, Theorems and Problems - Index.

Triangle Geometry, New York, Slideshow

Triangle Geometry in the Real World, New York - Slideshow.

Kosnita theorem

Kosnita's Theorem.
Circumcenters, Concurrent lines.

Routh's theorem index

Routh's Theorem - Index
Triangle, Cevians, Area, Ratio.
 

Marion Walter's theorem and related topics

Marion Walter's Theorem and Related Topics: Index

Routh's Theorem 1

Routh's Theorem 1.
Triangle, Cevians, Ratio of Areas.

Routh's theorem: Triangle, Cevians, Area Ratio

Routh's Theorem 2.
Triangle, Cevians, Ratio of Areas.

ROuth's Theorem 3: Triangle, Cevians, Ratio Area

Routh's Theorem 3.
Triangle, Cevians, Ratio of Areas.

Routh's theorem 4: Triangle, Cevians, Area

Routh's Theorem 4.
Triangle, Cevians, Ratio of Areas.

Euclid's Elements Book I,1 Proposition 7

Euclid's Elements Book I, Proposition 7
Given two straight lines constructed on a straight line (from its extremities) and meeting in a point,...

Euclid's Elements Book i,1 Proposition 8 SSS

Euclid's Elements Book I, Proposition 8: (Side-Side-Side SSS Congruence)

Euclid's Elements Book I,1 Proposition 5, Isosceles Triangle

Euclid's Elements Book I, Proposition 5: (Pons Asinorum) Isosceles triangles

Euclid's Elements Book I Proposition 6

Euclid's Elements Book I, Proposition 6: Converse of I.5

a

Euclid's Elements Book I, Proposition 4: (Side-Angle-Side SAS)

Euclid's Elements Book I, Proposition 3

Euclid's Elements Book I, Proposition 3: Given two unequal straight lines, to cut off from the greater a straight line equal to the less

Euclid's Elements Book I, Proposition 2

Euclid's Elements Book I, Proposition 2: To place at a given point (as an extremity) a straight line equal to a given straight line

Euclid's Elements Book I, Proposition 1

Euclid's Elements Book I, Proposition 1: On a given finite line to construct an equilateral triangle

Carnot's Theorem, Acute Triangle

Carnot's Theorem in an Acute Triangle.

Carnot's Theorem, Obtuse Triangle

Carnot's Theorem in an Obtuse Triangle.

iPad Geoboard: Pythagorean Theorem proof by Leonardo 

Geoboard for iPad Pythagorean Theorem Proof by Leonardo.

iPadd Apps Geoboard, triangle with two squares

Geoboard for iPad Gallery: Triangle with two squares (Problem 496).

iPad Geoboard: Six squares with a common vertex 

Geoboard for iPad Gallery: Six squares with a common vertex.

iPad Apps IGS Geometry Designer Illustration: Circle of van Lamoen 

iPad Apps, Geometry Designer Illustration. Circle of van Lamoen.
Interactive Geometry Software for iPad, iPhone, iPod.

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