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新手任务3-平面截正立方体
Author:
江南
GeoGebra
New Resources
兩組對邊相等的四邊形
画直线等分三角形的面积
球體建築師
【案例】2018年全国1卷理科12题
四邊形的特性
Discover Resources
均分除法（整數÷整數）
sun1
Pascal's Theorem
圓例2
达芬奇椭圆仪
Discover Topics
Surface
Matrices
Natural Numbers
Tangent Function
Arithmetic