三角形邊長性質（三角形邊長性質）〔數學奠基進教室，108年〕
Synopsis
特色：透過動手做三角形，觀察組不成三角形之三邊關係，並臆測三角形的邊長性質。 00:00 片頭00:20 活動一：三角形邊長的 ...
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