tolong pakai cara ya terima kasih

panjang rusuk kubua ABCD
= √144
= 12 cm

panjang AE : EB = 1 : 2
jadi AE = 1/3 x 12 = 4 cm
EB = 2/3 x 12 = 8 cm

EF = √4^2 + 8^2
= √16+64
=√√80 = 4√5

EG = √EF^2 + GH^2
= √(4√))^2 + (4√5)^2
= √80+80
= √160
= 4√10