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r = 4√3 cm
h = 4√3 : 2/3 = 4√3 *3/2 = 6√3 cm
h = (a√3)/2
6√3 = (a√3)/2√ =========>*2 pozbywasz się ułamka
12√3 = a√3
a = 12 cm
P = (a²√3)/4 = (144√3)/4 = 36√3 cm²