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Polygons
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Demonstrations 261  280 of 361
Four Concurrent Lines in a Cyclic Quadrilateral
Estimating Perimeter and Area of Simple Polygons
Signed Area of a Polygon
Dissecting an Ngram into Two Smaller Ngrams
Lindgren's Dissection of an Octagram into an Octagon
Lindgren's Dissection of One Octagram {8/3} into Two
Lindgren's Dissection of One Octagram into Two
Lindgren's Dissection of One Decagram {10/3} into Two Pentagrams {5/2}
Dissecting a Dodecagram into Two Hexagrams
Dissecting a Dodecagram {12/2} into a Hexagram {6/2}
Lindgren's Dissection of a Pentagram into a Decagon
Dissecting a Hexagram into Three Hexagrams
Dissecting a Dodecagram into a Triangle
Dissecting a Decagram {10/4} into Two Decagons
Dissecting an Octagon into Four Smaller Octagons
Dissecting a Decagon into Two Pentagons and Two Pentagrams
TwoOctagonsintoOne Dissection in Two Steps
Freese's TwoOctagonsintoOne Dissection
The 26Sided Unilluminable Room
The Minkowski Sum of a Disk and a Polygon
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