n-gon 之 externally dividing point √α:√β …√ψ:√ω σ'τ'…ω' 之 area ヲ求メヨ。 T.theodor 2023.2.25.
f(x) ト A(α,β) トノ distance ヲ求メヨ。 T.theodor 2023.2.25.
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