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2021全国乙卷理18(四棱锥,线面垂直,长度,二面角)
Author:
jjx01
Topic:
Pyramid
,
Solids or 3D Shapes
GeoGebra
New Resources
異分母分數減法
祖冲之的期望：内棋与外棋
三位數除以一位數（二）
三位數除以一位數（一）
探究三角形的全等條件
Discover Resources
Pappus古定理證明
Locus: Fixed Distance From Fixed Point
多物件逐一動畫
例题2（P点可拖动）
数线段
Discover Topics
Variance
Confidence Interval
Percentages
Centroid or Barycenter
Binomial Distribution