Mathematics
Junior High
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OBとBFはなぜ長さが等しいと分かるのでしょうか？？
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1
x R x q
A
D
M
H'
0
B
I
I
G
各国ⅡI
F
F
u, FBGNの延長線上の交点をDとする
B=BF=4mmより、求める体積は
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