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三角形內角和180度
Author:
范欣茹
Topic:
Triangles
GeoGebra
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兩位數加法
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
判斷球體
【案例】2018年全国1卷理科12题
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AREA
平行四邊形面積
水波干涉
百變火柴
重要的馬克勞林級數 (Some Important Maclaurin Series)
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Means
Square
Cylinder
Percentages
Inequalities