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Author:
陈铁成
GeoGebra
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找出對稱軸
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
四邊形的特性
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落在區域內的星星
牟合方蓋
glt-c02-09 五角柱旋轉
Exploration of the conditions for congruent triangles.
应用与艺术
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Diagrams
Tree Diagrams
Linear Equations
Terms
Equations