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弦心距
Author:
Gideon Huang
GeoGebra
New Resources
四邊形的特性
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
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
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由組織圖到頻數多邊形
四下_認識小數(教師版)
Task1
P3 平行與垂直01 測試
抛物线内接直角三角形斜边中点的轨迹
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Statistics
Perimeter
Isosceles Triangles
Combinatorics
Cuboid