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平行四邊形教材
Author:
蔡敏蓁
GeoGebra
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兩位數加法
【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
球體建築師
三位數除以一位數(一)
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認識線型函數關係式與圖形
正四角柱(可旋轉)
包絡線:橢圓
slope
直角三角形的內心與相似
Discover Topics
Line Segment
LCM and GCD
Constructions
Straight Lines
Hyperbola