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四下：三角形内角和（剪拼法）
Author:
钟秀群
,
yqzx0550
Topic:
Triangles
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
四邊形的特性
球體建築師
兩組對邊相等和有直角的四邊形
找出對稱軸
Discover Resources
總結
約分
三角柱
cube
圆柱展开成平行四边形2
Discover Topics
Continuity
Histogram
Congruence
Boxplot
Isosceles Triangles