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原子筆的長度
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GeoGebra Institute of Hong Kong
GeoGebra
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畫出對稱圖形
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
柱體建築師
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Quiz on Solving Compound Inequalities 解複合不等式：測驗
平移動畫
bkb-切割线定理
三角形，點上平分面積
P6 圓周
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Constructions
Square
Tree Diagrams
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Histogram