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多邊形的內角和
Autor:
現代中學數學 Modern Secondary Mathematics
Thema:
Winkel
,
Ebene Figuren
,
Polygone und Vierecke
透過觀察多邊形可分割成三角形的數量，探究多邊形的內角和。 (1B 冊第 4.10 及 4.11 頁適用)
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