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h=a√3:2=√3√3:2=3:2=1,5cm
odp. wysokosc ma 1,5cm
pole=a²√3:4=(√3)²√3:4=9√3:4=2,25√3cm²
promień okregu wpisanego=⅓ h Δ=⅓×1,5cm=½cm
promień okregu opisanego=⅔ h =⅔×1,5cm=1cm