Mathematics
Senior High
Resolved
（3）なす角は135度らしいのですが、なぜですか？
107 1辺の長さが6の立方体 ABCDEFGH について,
次の内積を求めよ。
(1) AB AD
*(2) AC・FB
*(3)
AE-GD
A
0
B
G
H
E
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