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Penyelesaian :Bangun I
= 10 : 10 : 10
= 1 : 1 : 1
Bangun II
= 10 : 10 : 12
= 5 : 5 : 6
Bangun III
= 12 : 12 : 10
= 6 : 6 : 5
Bangun IV
= 10 : 12 : 10
= 5 : 6 : 5
Jadi yg sama dan sebangun adalah B. II dan III
Smeoga membantu ^^
Maaf kalo salah ^^