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1. Obliczamy tworzącą l.
l√3:2=15cm
l√3=30
l=30√3:3
l=10√3cm
2.Obliczamy promień r.}
r=½l
r= 5√3 cm
3. Obliczamy pole całkowite stożka.
P=πr²(r+l)
P=π5√3(5√3 +10√3)
P=π75 + 150
P=225π cm²