On considère la figure ci-dessous :
{"init": {"range": [[-5.964515505318648, 4.654366392322546], [-4.830482731308783, 4.830482731308783]], "scale": [50, 50]}, "line": [[[-1.8680147813990786, -3.5370214554727473], [1.401011086049309, 2.6527660916045606], {"subtype": "segment", "stroke": "grey"}], [[1.3696839838292028, -3.8304827313087833], [-1.3696839838292028, 3.8304827313087833], {"subtype": "segment", "stroke": "grey"}], [[-4.964515505318648, -2.976206566296676], [0.0, 0.0], {"subtype": "segment", "stroke": "grey"}], [[3.654366392322545, 0.49548448171815845], [0.0, 0.0], {"subtype": "segment", "stroke": "grey"}], [[2.1694592366066954, -2.3161359194963835], [-3.1034666273062346, 0.54762519176001], {"subtype": "segment", "stroke": "grey"}], [[-1.9680147813990787, -3.5370214554727473], [-1.7680147813990785, -3.5370214554727473], {"stroke": "darkslategrey"}], [[-1.8680147813990786, -3.6370214554727474], [-1.8680147813990786, -3.437021455472747], {"stroke": "darkslategrey"}], [[1.301011086049309, 2.6527660916045606], [1.501011086049309, 2.6527660916045606], {"stroke": "darkslategrey"}], [[1.401011086049309, 2.5527660916045605], [1.401011086049309, 2.7527660916045606], {"stroke": "darkslategrey"}], [[-0.5670036953497697, -0.8842553638681868], [-0.3670036953497696, -0.8842553638681868], {"stroke": "blue"}], [[-0.46700369534976965, -0.9842553638681868], [-0.46700369534976965, -0.7842553638681868], {"stroke": "blue"}], [[1.2696839838292027, -3.8304827313087833], [1.4696839838292028, -3.8304827313087833], {"stroke": "darkslategrey"}], [[1.3696839838292028, -3.9304827313087833], [1.3696839838292028, -3.730482731308783], {"stroke": "darkslategrey"}], [[-1.4696839838292028, 3.8304827313087833], [-1.2696839838292027, 3.8304827313087833], {"stroke": "darkslategrey"}], [[-1.3696839838292028, 3.730482731308783], [-1.3696839838292028, 3.9304827313087833], {"stroke": "darkslategrey"}], [[-5.0645155053186475, -2.976206566296676], [-4.864515505318648, -2.976206566296676], {"stroke": "darkslategrey"}], [[-4.964515505318648, -3.076206566296676], [-4.964515505318648, -2.876206566296676], {"stroke": "darkslategrey"}], [[3.554366392322545, 0.49548448171815845], [3.754366392322545, 0.49548448171815845], {"stroke": "darkslategrey"}], [[3.654366392322545, 0.3954844817181584], [3.654366392322545, 0.5954844817181585], {"stroke": "darkslategrey"}], [[2.0694592366066953, -2.3161359194963835], [2.2694592366066955, -2.3161359194963835], {"stroke": "darkslategrey"}], [[2.1694592366066954, -2.4161359194963836], [2.1694592366066954, -2.2161359194963834], {"stroke": "darkslategrey"}], [[-3.2034666273062347, 0.54762519176001], [-3.0034666273062345, 0.54762519176001], {"stroke": "darkslategrey"}], [[-3.1034666273062346, 0.44762519176001003], [-3.1034666273062346, 0.64762519176001], {"stroke": "darkslategrey"}], [[-1.0958740249824883, -0.5970223698932615], [-0.8958740249824884, -0.5970223698932615], {"stroke": "green"}], [[-0.9958740249824883, -0.6970223698932615], [-0.9958740249824883, -0.49702236989326154], {"stroke": "green"}], [[0.4049400946039182, -1.4121245013893067], [0.6049400946039182, -1.4121245013893067], {"stroke": "orange"}], [[0.5049400946039182, -1.5121245013893068], [0.5049400946039182, -1.3121245013893066], {"stroke": "orange"}], [[-0.1, 0.0], [0.1, 0.0], {"stroke": "red"}], [[0.0, -0.1], [0.0, 0.1], {"stroke": "red"}]], "label": [[[-1.8680147813990786, -3.5370214554727473], "A", "below left", {"color": "darkslategrey"}], [[1.401011086049309, 2.6527660916045606], "B", "above right", {"color": "darkslategrey"}], [[-0.46700369534976965, -0.8842553638681868], "C", "below left", {"color": "blue"}], [[1.3696839838292028, -3.8304827313087833], "E", "below right", {"color": "darkslategrey"}], [[-1.3696839838292028, 3.8304827313087833], "F", "above", {"color": "darkslategrey"}], [[-4.964515505318648, -2.976206566296676], "G", "below left", {"color": "darkslategrey"}], [[3.654366392322545, 0.49548448171815845], "H", "right", {"color": "darkslategrey"}], [[2.1694592366066954, -2.3161359194963835], "I", "below right", {"color": "darkslategrey"}], [[-3.1034666273062346, 0.54762519176001], "J", "above left", {"color": "darkslategrey"}], [[-0.9958740249824883, -0.5970223698932615], "K", "left", {"color": "green"}], [[0.5049400946039182, -1.4121245013893067], "L", "below right", {"color": "orange"}], [[0.0, 0.0], "O", "above", {"color": "red"}]]}
Donner, si possible, le nom de l'angle opposé par le sommet à l'angle \(\widehat{FOK}\).