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弓形的滚动
Author:
萧若茂
GeoGebra
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【案例】2018年全国1卷理科12题
三位數除以一位數（二）
小数 的副本
畫出對稱圖形
找出對稱軸
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初犯九點圓
测试 = =
三角柱算體積(可以切開)
UpdateConstruction
二分法
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Perimeter
Subtraction
Addition
Trapezoid
Right Triangles