1)oblicz pole koła jesli trojkat rownoboczny wpisany w to kolo ma pole 3√3cm²
2) oblicz pole kola jesli trojkat rownoboczny opisany na tym kole ma pole 9√3cm²
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PΔ=3√3cm²
a²√3:4=3√3
a²√3=12√3
a²=12
a=√12=2√3cm--bokΔ
r=a√3/6=2√3·√3/6=1cm
P=πr²=π·1²=πcm
zad2
9√3=a²√3:4
a²√3=36√3
a²=36
a=6cm
r=a√3/3=6√3/3=2√3
P=π·(2√3)²=12πcm²