Lōe-chhiat-îⁿ

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Chi̍t ê saⁿ-kak-hêng ê lōe-chhiat-îⁿ

sò͘-ha̍k kap kí-hô tiong, tī chi̍t ê 2 chhù-goân pêng-bīn téng, to-pian-hêng ê ta̍k tiâu piⁿ lóng ē-tàng chham to-pian-hêng lōe-pō͘ ê chi̍t ê îⁿ sio-chhiat, hit-ê îⁿ chiū hō-chò lōe-chhiat-îⁿ (內切圓).