NCTMThe Department of Mathematics Education
MacTutor History of Mathematics Site  St. Andrew's University
Math Forum (alias Geometry Forum)
Writeup #1

When are two linear functions f(x) and g(x) tangent
to the product h(x) = f(x)g(x) ? 
Writeup #2

Graphs of x^2 + axy + y^2 = 9 
Writeup #3

Some Different Ways to Examine ax^2 + bx + c
= 0 
Writeup #4

Properties of centroid(G) 
Writeup #5

Jongsuk's GSP Scripts 
Writeup #6

Exploring of a parabola 
Writeup #7

Exploring of tangent Circles 
Writeup #8

Properties of Orthocenter 
Writeup #9

Pedal Triangles 
Writeup#10

Parametric Curves 
Writeup #11

Polar Equations 
Writeup #12

The Spreadsheet in Math. Exploration 
Essay1 Distance in Minkowski
and Cartesian geometry
Essay2 Conic Sections