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P=a²√3:4
P=4²√3:4
P=16√3:4
P=4√3
b)√3cm
P=a²√3:4
P=√3²√3:4
P=3√3:4
c)√12m
P=a²√3:4
P=√12²√3:4
P=12√3:4
P=3√3
liczę na naj ;P