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Žό’·
₯l‹C‹LŽ–Χέ·έΈή
ψκ2.‰~‚ΜŽό’·
‰~‚ΜŽό’· c ‚Ν’ΌŒa‚π d‰~Žό—¦‚π π ‚Ζ‚·‚ι‚Ζ

c = π d {\displaystyle c=\pi d} ‚Ζ•\‚³‚κ‚ι‘”ΌŒa‚π r ‚Ζ‚΅‚Δ

c = 2 π r {\displaystyle c=2\pi r} ‚Ζ•\‚³‚κ‚ικ‡‚ΰ‘½‚’‘‚Θ‚¨€‘S‚Δ‚Μ‰~‚ΝŒέ‚’‚Ι‘ŠŽ—‚Ε‚ ‚ι‚Μ‚Ε€Žό’·‚Μ“™‚΅‚’2‚Β‚Μ‰~‚Μ–ΚΟ S ‚Ν“™‚΅‚’‘S ‚Ν c ‚π—p‚’‚Δ

S = r c 2 {\displaystyle S={\frac {rc}{2}}} ‚Ζ•\‚·‚±‚Ζ‚ͺ‚Ε‚«‚ι‘

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2019/08/13 18:31
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