Plane Geometry
Demonstrations 921 - 940 of 1216
 A Parallelogram Defined by the Centers of Four Circumcircles Estimating Perimeter and Area of Simple Polygons The Contact Triangle and Two Other Subtriangles The Nagel Point Nagel's Theorem Signed Area of a Polygon Second Droz-Farny Circle First Droz-Farny Circle Dissecting an N-gram into Two Smaller N-grams 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} Barrow's Inequality 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

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