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旁心
Author:
王廷祐
旁心
GeoGebra
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異分母分數減法
兩位數加法
拼砌四邊形
兩組對邊相等和有直角的四邊形
球体的体积推导（优化版）
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等積的正方形與正三角形
相似三角形例題
整數或分數÷分數_ 工作紙（一）_題2c
How to draw a square with ruler and compasses?
二次函数y=a(x-h)^2+k各参数性质
Discover Topics
Area
Cuboid
Equations
Differential Calculus
Logarithmic Functions