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Proof2
Author:
郭亮偉
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
【案例】2018年全国1卷理科12题
第八周作业
【案例】2013年安徽高考15题
球体的体积推导
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八年级奥数之双曲线
circle: line from centre
時鐘
变化的三角形的内心.许兴华数学
作线段和角
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Trapezoid
Similar Triangles
Multiplication
Cone
Kite