P₁/P₂=1/3
P₁=πr²
P₂=πR²
πr²/ πR²=1/3
r²/ R²=1/3
(r/R)²=1/3
r/R=√⅓
r/R=1:√3=√3/√3*√3=√3/3
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P₁/P₂=1/3
P₁=πr²
P₂=πR²
πr²/ πR²=1/3
r²/ R²=1/3
(r/R)²=1/3
r/R=√⅓
r/R=1:√3=√3/√3*√3=√3/3