Revision #883 → #1463 · back to history
addedPentagon9dba4bf23124
addedSum of internal angles of a simple pentagone6d74c5d7173
addedPentagram (self-intersecting regular pentagon)295fc81dd7a3
addedRegular pentagon (Schläfli symbol and interior angles)9e6c6d29e8eb
addedSymmetries of the regular pentagon009f27714c88
addedDiagonals of a convex regular pentagon are in golden ratio to sides6d596bcaeaf4
addedHeight, width, diagonal, and circumradius formulas in terms of side length4c2c78051c66
addedArea of a convex regular pentagon by side length471b76a94d57
addedEdge length from circumradiusafbb644efc6b
addedFill ratio of regular pentagon in circumscribed circle80945d2dafe2
addedArea of a regular polygon formula4dd1703f1894
addedArea of regular pentagon via perimeter and inradiuscb1f0fa0efc6
addedInradius (apothem) of regular pentagond6f47195620e
addedChord sum identity on circumcircle of regular pentagon1be2db12b41d
addedDistance identity for arbitrary point in plane of regular pentagon3f6e3f6184bd
addedDistance identity for point on circumcirclec25edbdd3d9a
addedRegular pentagon is constructible with compass and straightedge11adf1bfa98f
addedRichmond's construction of the regular pentagon8684edf4ecdf
addedCarlyle circles construction of the regular pentagon0415ed2d1685
addedTrigonometric construction of regular pentagon5516d70a8332
addedEuclid's construction of the regular pentagon40f2b19506ab
addedPaper-strip knot construction of regular pentagon51a68f98cfca
addedHexagon-folding construction of pentagonal pyramid base048015a32ad9
addedSymmetry group of regular pentagon87cadf374625
addedPentagram (regular star pentagon)8eb8ad4accc1
addedSides of pentagram form diagonals of regular convex pentagon in golden ratioee1fe4488e6a
addedEquilateral pentagonb575a8679077
addedUniqueness of the regular pentagon up to similarityc49418c503d3
addedCyclic pentagon37f583ba1fed
addedArea of cyclic pentagon as root of septic equationff1f9553119e
addedRobbins pentagons9ceaa5ffab84
addedDiagonals of a Robbins pentagon all rational or all irrationalf55bbef63ca6
addedInequality for sides and diagonals of convex pentagons738be2a9a72a
addedRegular pentagon cannot tile regularly49bfe54d2009
addedOptimal packing density of regular pentagons (Hales–Kusner)67a12887824b
addedFifteen classes of pentagons that monohedrally tile the plane609875e2cc56