Shapes of constant width (An Interactive Gizmo)
What is it about?
A Mathematical Droodle

Explanation

Shapes of Constant Width

• Shapes of constant width
• Crossed-Lines Construction of Shapes of Constant Width
• Shapes of constant width (An Interactive Gizmo)
• Star Construction of Shapes of Constant Width
• Reuleaux's Triangle, Extended

Convex Sets

• Helly's Theorem
• First Applications of Helly's Theorem
• Crossed-Lines Construction of Shapes of Constant Width
• Shapes of constant width (An Interactive Gizmo)
• Star Construction of Shapes of Constant Width
• Convex Polygon Is the Intersection of Half Planes
• Minkowski's addition of convex shapes
• Perimeters of Convex Polygons, One within the Other
• The Theorem of Barbier
• A. Soifer's Book, P. Erdos' Conjecture, B. Grunbaum's Counterexample
• Reuleaux's Triangle, Extended

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