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初中八年级奥数：面积与面积法
Author:
王俊辉
拖动A、B、C、D，改变四边形形状
GeoGebra
New Resources
異分母分數減法
球体的体积推导
画直线等分三角形的面积
柱體建築師
判斷球體
Discover Resources
認識線型函數
方塊圖_李樂雯
不規則形陰影作圖2
兩面角
工作紙-真分數乘以真分數
Discover Topics
Similar Triangles
Trapezoid
Right Triangles
Surface
Histogram