八下第17章《勾股定理》P30勾股定理的直观证明-传说中毕达哥拉斯的证法(赵朝东)
赵朝东
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- Resource Type
-
Activity
- Tags
-
- Target Group (Age)
- 3 – 19+
- Language
- Chinese Simplified / 简体中文
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