bonsoir
angle RIA
Tan RIA = 5/6
ArcTan = 39.8 °
ARI ≅ 180 - 90 - 39.8 = 50.2 °
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bonsoir
angle RIA
Tan RIA = 5/6
ArcTan = 39.8 °
ARI ≅ 180 - 90 - 39.8 = 50.2 °