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厚會聚透鏡 Thick Convergent Lens
Author:
W.L. Wong, Albert
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
拼砌四邊形
兩位數除以一位數（一）
球體建築師
找出對稱軸
Discover Resources
判斷柱體 5
反演(Inversion)
circuit
sdjkgsdfagjklsanklgsa
線的面化
Discover Topics
Polygons
Combinatorics
Rational Numbers
Dilation
Tangent Function