勾股定理无字证明有很多种:分割股边法,梯形法,射影法(垂直投影法),周髀算经,...
勾股定理动画演示:可以用动画方式展示勾股定理
特殊直角三角形:勾三股四弦五(345)
math Ku
- Target Group (Age)
- 9 – 19+
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