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同心圓+等分割線
Author:
許清惟
GeoGebra
New Resources
算柱 (兩位數)
拼砌四邊形
兩組對邊相等的四邊形
画直线等分三角形的面积
四邉形 (四年級) 教師版
Discover Resources
整數或分數÷分數_ 工作紙（一）_題2c
交流电的模拟
內擺線觀察
圖四的副本
test
Discover Topics
Cube
Histogram
General Quadrilateral
Exponential Functions
Quadratic Equations