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七年级数学平行线间的橡皮筋问题
Author:
陈小南
Topic:
Geometry
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
判斷球體
球体的体积推导（优化版）
找出對稱軸
四邊形的特性
Discover Resources
DSE
雙曲線20160521
三角形三內角和
ex 8
Question 4
Discover Topics
Mathematics
Angles
Straight Lines
Vectors 3D (Three-Dimensional)
Plane Figures or Shapes