Saltire Software
Technical Software
Mechanical Expressions
Geometry Expressions
Math Illustrations
Analytix
Apps & eBooks
Common Core Nuggets
Mechanical Engineering
Mechanical Expressions
Analytix
Atlas of Linkages
Print a Motion
Advanced Geometric JavaScript Applets
Some interesting, somewhat more difficult geometric configurations are presented here.
A cubic spline construction
Intersections of exterior common tangents to 3 circles
Intersections of interior common tangents of 3 circles
An isosceles triangle theorem
A theorem using the Pythagoras diagram but yielding a surprising triangle
A derived quadrilateral
Napoleon's Theorem
Circle through three points
4 special points of a triangle