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講師：高山よしなり
第７章 三平方の定理
１１．立体上の最短距離と三平方の定理 基本問題
中学３年数学講座
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基本問題
右図のように、たて4cm、横6cm、高 さ2cmの直方体について、点Aから点 Gまで糸をかける。このとき、もっ とも短くなるように糸をかけたとき
の長さを求めよ。 6cm 4cm
2cm
A
B C
D E
F G
H
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