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同心圓
Author:
許清惟
GeoGebra
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第八周作业
兩組對邊相等的四邊形
球體建築師
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
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用極座標做時鐘
vbcvbcvbcvbcvbcvcv
銳角三角函數
Question 8
平行四邊形的面積的副本
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Random Experiments
Surface
Diagrams
Cylinder
Addition