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concurrence of medians and bimedians of tetrahedron
Author:
johnmayhk
GeoGebra
New Resources
第八周作业
畫出對稱圖形
兩位數除以一位數（二）
兩位數加法
【案例】2018年全国1卷理科12题
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四角柱(底面為可調整梯形)
平行四邊形柱算體積(可以切開)
勾股定理
P4 多邊形周界01 測試
函数的旋转与翻折动画
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Pie Chart or Circle Chart
Parallelogram
Calculus
Addition
Symmetry