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8=a√2/*√2
8√2=2a/:2
4√2=a
b√2=4√2/:√2
b=4
H²=8²-b²
H²=64-4²
H²=64-16
H²=48/√
H=√48
H=2√12
V=Pp*H
V=b²*2√12
V=8*2√12
V=16√12
2.
z=80√2
x=z√3
x=80√2*√3
x=80√6