Mathematics
Senior High
解説教えてください〜😭
答えはOA=3、∠OAB= 45°ですー！
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Exercise
30 四面体OABCにおいて, AB=2√2, AC =3√2,OB=√5,0A=OC,
り立つとき, OAの長さと ∠OAB の大きさを求めよ。
∠OAB=∠OAC が成
(芝浦工大 ・ 改
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