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推移（x 方向）的副本
Author:
xiaodandan
,
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
拼砌四邊形
四邊形的特性
兩組對邊相等和有直角的四邊形
球體建築師
柱體建築師
Discover Resources
計算在區域內部的圖形總數
等腰三角形
四下_面積（一）(學生版)
橢圓摺紙
對稱成分(零序.正序.負序)
Discover Topics
Piecewise Functions
Arithmetic
Logic
Kite
Fractions