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長方形
Author:
Yin Kelvin Wong
GeoGebra
New Resources
垂直線的斜率
龙形曲线-分形龙2
百分數及其應用
祖冲之的期望：内棋与外棋
盈利與虧蝕
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範例
磁磚著色
max{f(x),g(x),s(x)} 與 min{f(x),g(x),s(x)}
畢氏定理動畫
橢圓3--平行四邊形法
Discover Topics
Scalene Triangles
Rhombus
Algebra
Sine
Set Theory