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谢尔宾斯基三角形
Author:
孟宝兴
GeoGebra
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四邉形 (四年級) 教師版
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
三位數除以一位數(一)
三位數除以一位數(二)
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小數試用
Normal Vector
test P1的副本
Uses of Trigonometry
少了一個質數One less prime number
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Matrices
Translation
Polygons
Angles
Optimization Problems