- Conic through 5 points
- Archimedes Twins
- Square wheeled bicycle
- Area Under a 4 bar linkage
- A geometry theorem
- Maximum Area Configuration of a Four Bar Linkage
- Train Problem
- Projectile Focus
- Scotch Yoke
- Falling faster than gravity
- Maximum range on a slope
- Four Bar Mechanism for Intermittent Drive
- A door which opens both ways
- I beam
- Door Which Opens Both Ways
- A path round an elliptical pool
- A Path round an elliptical pool
- Reflection in a circle
- I beam
- Curve Area
- Pantograph
- Ferry Problem
- Caustic of y=f(X)
- Ball Throw Modeled with Geometry Expressions
- Ball Throw Modeled with Mechanical Expressions
- Ball Throw Animation
- A Locus Problem
- October Problem
- Simpson Line
- Simpson Line and 9 point Circle
- Parabolic Mirror
- Caustic curve as focus of parabola