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分數加法
Author:
iedc
GeoGebra
New Resources
兩位數除以一位數（一）
拼砌四邊形
第八周作业
找出對稱軸
兩組對邊相等和有直角的四邊形
Discover Resources
Nets of a square pyramid
判斷錐體 2
複合圖形(一)
箏形
外接圓的心
Discover Topics
Rectangle
Histogram
Derivative
Intersection
Trigonometry