[{"data":1,"prerenderedAt":37},["ShallowReactive",2],{"history-block-half-square":3},{"designer":4,"brackman":5,"related":7,"sources":12,"da":19,"en":28},null,[6],"113",[8,9,10,11],"hourglass","pinwheel","broken-dishes","chevron",[13,14,15,16,17,18],"brackman-knickerbocker","iqm-triangles-england","iqm-triangles-1883","brackman-tessellations","iqm-triangles-mifflin","iqm-triangles-rajasthan",{"lead":20,"period":21,"history":22,"use":25},"Et kvadrat delt på diagonalen i to trekanter, der får deres mønster af, hvordan blokkene vendes.","USA og England; felter af trekanter fra slutningen af 1700-tallet",[23,24],"Felter af trekanter er meget gamle. Barbara Brackman skriver, at de ses i de allertidligste quilts, og viser medallion-tæpper med en flade af trekanter, indskrevet \"Anna Tuels ... 1785\" og \"1807 M.B.\". Det internationale quiltmuseum i Lincoln, Nebraska, har rækker af små ens trekanter fra England fra omkring 1840 og en rød og hvid quilt dateret 1883, måske fra New Hampshire.","Et gammelt navn for trekanten som selvstændig blok har vi ikke fundet. Museet kalder quiltene Triangles, men bruger også det navn om andre mønstre. Hvem der fandt på ordet half-square triangle, har vi heller ikke fundet. De mest brugte navne for mønstre af trekanterne, [[broken-dishes]] og Yankee Puzzle, kom ifølge Brackman først med bøger fra første halvdel af 1900-tallet.",[26,27],"Pointen er at vende blokkene: Brackman samler dem alle under ét nummer og viser, hvordan de ændrer sig, når de drejes eller sættes på spidsen. Museet i Lincoln har en quilt fra 1890–1910, sandsynligvis fra Mifflin County i Pennsylvania, hvor vendte trekanter danner ruder, og en fra 1880–1890, måske fra Rajasthan i Indien, af store trekanter i rester, vendt på forskellige måder.","Her ses det i [[quilt:triangles-every-other]] og [[quilt:triangles-around]]: samme blok, vendt hver anden eller fire rundt. Trekanten er også byggesten i blokke som [[pinwheel|vindmølle]], og delt én gang til bliver den til [[hourglass|timeglas]].",{"lead":29,"period":30,"history":31,"use":34},"A square divided on the diagonal into two triangles, which get their pattern from how the blocks are turned.","USA and England; fields of triangles from the late 1700s",[32,33],"Fields of triangles are very old. Barbara Brackman writes that they are seen in the earliest of quilts and shows medallion coverlets with a field of triangles, inscribed \"Anna Tuels ... 1785\" and \"1807 M.B.\". The International Quilt Museum in Lincoln, Nebraska, has rows of small identical triangles from England from about 1840 and a red and white quilt dated 1883, possibly from New Hampshire.","We have found no old name for the triangle as a block of its own. The museum calls these quilts Triangles, but uses that name for other patterns too. Nor have we found who coined the term half-square triangle. The names most used for patterns of these triangles, [[broken-dishes]] and Yankee Puzzle, came according to Brackman only with books from the first half of the 1900s.",[35,36],"The point is to turn the blocks: Brackman gathers them all under one number and shows how they change when rotated or set on point. The museum in Lincoln has a quilt from 1890–1910, probably from Mifflin County, Pennsylvania, in which turned triangles form diamonds, and one from 1880–1890, possibly from Rajasthan in India, of large scrap triangles turned various ways.","Here you see it in [[quilt:triangles-every-other]] and [[quilt:triangles-around]]: the same block, every other turned or four round. The triangle is also a building block of blocks like [[pinwheel]], and divided once more it becomes an [[hourglass]].",1794245545209]