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內公切線長
Author:
luke huang
GeoGebra
New Resources
兩位數除以一位數（一）
拼砌四邊形
第八周作业
球體建築師
【案例】圆柱体内放置一个大球六个小球
Discover Resources
Animacja (kółka)
曲柄搖桿接雙搖桿
Copy of 固定面積的圖形的周界變化
第4課
運用量度器比較角的大小
Discover Topics
Expected Value
Confidence Interval
Arithmetic Operations
Reflection
Polygons