d=a√2
a=d/√2
S осн= а²=d²/2
V=1/3×S осн×h = 1/3×d²/2×h=d²h/6
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d=a√2
a=d/√2
S осн= а²=d²/2
V=1/3×S осн×h = 1/3×d²/2×h=d²h/6