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六上：圆的面积公式推导
Author:
钟秀群
Topic:
Circle
GeoGebra
New Resources
GeoGebra笔记功能体验课件
兩位數加法
球體建築師
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
Discover Resources
正四面體空間中投影
西瓦定理 (Ceva's Theorem)
DSE Circle-ACT03C Relationship Between Arcs and Angles at Circumference
speed
folding paper by Mr LO WY
Discover Topics
Fractions
Trapezoid
Arithmetic
Area
Root