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Pp=a²√3/4=√3
12cm²=1/2×a×h |×2
24cm²=2h |/2
12cm=H
V=1/3×√3cm²×12cm=1/3×12√3cm³=4cm³
P=a²√3
4
P=2²√3 P=4√3
4 4
P=√3
H:
H=12÷2
H=6
V=⅓ Pp×H
V=⅓ √3×6
V=3√3