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Porch Problem

Author:Frank Sedgwick

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bewijs stelling van Pythagoras
Focus and Directrix
Sum of Squares: Proof without Words
Fractal Tétraèdre. Dilatation -1/2 centre triangles
The Gardener's Circle

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Pythagorean Proof
Perpendicular Bisector
Thing from 12/14
Day 90
Equable shapes

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Rotation
Linear Programming or Linear Optimization
Step Functions
Geometry
Polygons

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