算数 小4 -11【垂直・平行と四角形】台形・平行四辺形・ひし形の特徴を解説！ 平行と角の関係も確認！ 対角線についても学習！
Synopsis
小学4年生 算数の「垂直・平行と四角形」が、ゼロから学べます。 垂直は、2つの直線が直角(90度)に交わること。 平行は、2つの ...
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