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P=a²√3/4
i h=a√3/2
czyli
4=a√3/2
a=8√3/3
P=(8√3)²√3/3*4
P=16√3j²
y=2x=bok
x=¹/₂y=połowa boku
h²+x²=y²
4²+x²=4x²
16=3x²
16:3=x²
x=√(16:3)=4/√3=4√3/3
y=8√3/3
P=y²√3/4=(8√3/3)²*√3/4=48