Online Geometry: Congruence, Rotation, Translation, Reflection  Page 6




Proposed Problem 78: Angles of a Circle.
Perpendicular and parallel lines, Midpoint, Diameter, Chord, Cyclic
quadrilateral, Congruence.


Proposed Problem 65: Right Triangle, Mindpoints. 

Interactive Hinged tessellation. Square tessellation  Dynamic Geometry.
Please be patient while the applet loads on your computer. This Java
applet requires Java 1.3 or higher. 

Archimedes' Book of Lemmas.
Proposition 5,
Arbelos, Archimedean Twins.


I have
used Geometry Expressions, the world's first Interactive
Symbolic Geometry System, to visualize the Archimedean Twins and
check out a variety of conjectures.


Proposed Problem 60: Isosceles
triangle and angles. 

Proposed Problem 59: Right and Equilateral Triangles, Midpoints 

Proposed Problem 58: Right Triangle, Congruence, Perpendiculars. 

Triangle and Squares 22


Triangle and Squares
20


Proposed Problem 49.
Angles and right triangle.


Proposed Problem 48.
Angles and triangles.


Proposed Problem 47.
Angles and triangles.


Proposed Problem 46.
Angles and triangles.


Proposed Problem 45.
Angles and triangles.


Proposed Problem 44.
Angles and triangles.


Proposed Problem 43.
Angles and triangles. 

Proposed Problem 42.
Angles and triangles. 

Proposed
Problem 37.
Right Triangle, altitude, incircles, incenters, and orthocenter. 

Triangle and Squares
16


Triangle and Squares
14 

Triangle and Squares 13 
Previous 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
Next
