On considère la figure ci-dessous :
{"init": {"range": [[-8.833229257934592, 4.278909325622628], [-4.250902186010196, 4.250902186010196]], "scale": [50, 50]}, "line": [[[-3.9535695088157654, -0.607690825142413], [2.9651771316118243, 0.4557681188568098], {"subtype": "segment", "stroke": "grey"}], [[-1.4031275830972174, -3.2509021860101956], [1.4031275830972174, 3.2509021860101956], {"subtype": "segment", "stroke": "grey"}], [[-7.833229257934592, 1.8312106142493543], [0.0, 0.0], {"subtype": "segment", "stroke": "grey"}], [[3.278909325622628, -2.53124091129052], [0.0, 0.0], {"subtype": "segment", "stroke": "grey"}], [[-0.6016551030906107, -3.1277103535109516], [-1.3751296513172722, 2.823864940939745], {"subtype": "segment", "stroke": "grey"}], [[-4.053569508815765, -0.607690825142413], [-3.8535695088157653, -0.607690825142413], {"stroke": "darkslategrey"}], [[-3.9535695088157654, -0.707690825142413], [-3.9535695088157654, -0.507690825142413], {"stroke": "darkslategrey"}], [[2.865177131611824, 0.4557681188568098], [3.0651771316118244, 0.4557681188568098], {"stroke": "darkslategrey"}], [[2.9651771316118243, 0.3557681188568098], [2.9651771316118243, 0.5557681188568098], {"stroke": "darkslategrey"}], [[-1.0883923772039414, -0.15192270628560325], [-0.8883923772039414, -0.15192270628560325], {"stroke": "blue"}], [[-0.9883923772039414, -0.25192270628560326], [-0.9883923772039414, -0.05192270628560325], {"stroke": "blue"}], [[-1.5031275830972175, -3.2509021860101956], [-1.3031275830972173, -3.2509021860101956], {"stroke": "darkslategrey"}], [[-1.4031275830972174, -3.3509021860101957], [-1.4031275830972174, -3.1509021860101956], {"stroke": "darkslategrey"}], [[1.3031275830972173, 3.2509021860101956], [1.5031275830972175, 3.2509021860101956], {"stroke": "darkslategrey"}], [[1.4031275830972174, 3.1509021860101956], [1.4031275830972174, 3.3509021860101957], {"stroke": "darkslategrey"}], [[-7.933229257934592, 1.8312106142493543], [-7.7332292579345925, 1.8312106142493543], {"stroke": "darkslategrey"}], [[-7.833229257934592, 1.7312106142493542], [-7.833229257934592, 1.9312106142493544], {"stroke": "darkslategrey"}], [[3.178909325622628, -2.53124091129052], [3.378909325622628, -2.53124091129052], {"stroke": "darkslategrey"}], [[3.278909325622628, -2.63124091129052], [3.278909325622628, -2.43124091129052], {"stroke": "darkslategrey"}], [[-0.7016551030906106, -3.1277103535109516], [-0.5016551030906107, -3.1277103535109516], {"stroke": "darkslategrey"}], [[-0.6016551030906107, -3.2277103535109517], [-0.6016551030906107, -3.0277103535109515], {"stroke": "darkslategrey"}], [[-1.4751296513172723, 2.823864940939745], [-1.275129651317272, 2.823864940939745], {"stroke": "darkslategrey"}], [[-1.3751296513172722, 2.723864940939745], [-1.3751296513172722, 2.9238649409397452], {"stroke": "darkslategrey"}], [[-1.1397250281414224, 0.2430613792523292], [-0.9397250281414223, 0.2430613792523292], {"stroke": "orange"}], [[-1.0397250281414223, 0.1430613792523292], [-1.0397250281414223, 0.3430613792523292], {"stroke": "orange"}], [[-0.8748297877300244, -1.7952008648830242], [-0.6748297877300244, -1.7952008648830242], {"stroke": "green"}], [[-0.7748297877300244, -1.8952008648830243], [-0.7748297877300244, -1.6952008648830241], {"stroke": "green"}], [[-0.1, 0.0], [0.1, 0.0], {"stroke": "red"}], [[0.0, -0.1], [0.0, 0.1], {"stroke": "red"}]], "label": [[[-3.9535695088157654, -0.607690825142413], "A", "left", {"color": "darkslategrey"}], [[2.9651771316118243, 0.4557681188568098], "B", "right", {"color": "darkslategrey"}], [[-0.9883923772039414, -0.15192270628560325], "C", "above left", {"color": "blue"}], [[-1.4031275830972174, -3.2509021860101956], "E", "below", {"color": "darkslategrey"}], [[1.4031275830972174, 3.2509021860101956], "F", "above right", {"color": "darkslategrey"}], [[-7.833229257934592, 1.8312106142493543], "G", "left", {"color": "darkslategrey"}], [[3.278909325622628, -2.53124091129052], "H", "below right", {"color": "darkslategrey"}], [[-0.6016551030906107, -3.1277103535109516], "I", "below", {"color": "darkslategrey"}], [[-1.3751296513172722, 2.823864940939745], "J", "above", {"color": "darkslategrey"}], [[-1.0397250281414223, 0.2430613792523292], "K", "above left", {"color": "orange"}], [[-0.7748297877300244, -1.7952008648830242], "L", "below", {"color": "green"}], [[0.0, 0.0], "O", "above right", {"color": "red"}]]}
Donner, si possible, le nom de l'angle opposé par le sommet à l'angle \(\widehat{ACI}\).