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a=10cm
P=(6×10²√3):4
P=(6×100√3):4
P=6×25√3
P=90√3 cm²
b)R=a
a=3√2 cm
P=(6×(3√2)²√3):4
P=(6×18√3):4
P=(108√3):4
P=27√3 cm²
r=a
r=10cm
a=10cm
P=3*a²√3/2
P=3*100√3/2
P=150√3cm²
b)
r=a
r=3√2 cm
a=3√2 cm
P=3*a²√3/2
p=3*(3√2)²√3/2
P=3*18√3/2
P=27√3 cm²