三角形的邊長有任二邊和大於第三邊，且任二邊差小於第三邊的性質，哪反過來探究呢?
怎樣的邊長配置可以構成三角形呢?一定要檢查那麼多條件嗎?
李宬風
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- Target Group (Age)
- 14 – 18
- Language
- Chinese Traditional / 繁體中文
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