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梅涅勞斯(Menelaus)定理
Author:
acchu
GeoGebra
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兩位數除以一位數（一）
第八周作业
画直线等分三角形的面积
畫出對稱圖形
【案例】圆柱体内放置一个大球六个小球
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乘法1
圓周 (圖形B)
認識時鐘
p10-4
图形的放大与缩小.许兴华数学
Discover Topics
Equilateral Triangles
Continuity
Random Experiments
Quadratic Functions
Step Functions