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sehingga menjadi ΔABG
Diagonal bidang kubus = s√2
Diagonal ruang kubus = s√3
AG = s√3 = 6√3
BG = s√2 = 6√2
Perbandingan Luas dalam ΔABG
AB x BG = AG x BP --> BP = jarak B ke garis AG
6 x 6√2 = 6√3 x BP ----> BP = 6 x 6√2 / 6√3
= 6 √2 / √3
= 6/3 √6
= 2√6