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厚會聚透鏡 Thick Convergent Lens
Author:
W.L. Wong, Albert
GeoGebra
New Resources
拼砌四邊形
三位數除以一位數（二）
判斷球體
找出對稱軸
球體建築師
Discover Resources
六下_圓周(教師版)
square construction
for 學姊
分水問題
Activity 3
Discover Topics
Percentages
Parallelogram
Statistics
Kite
Indefinite Integral