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Hamid Naderi Yeganeh segment4
Author:
ping_chiang
Topic:
Constructions
GeoGebra
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兩位數加法
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
球體建築師
兩組對邊相等和有直角的四邊形
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推移（x 方向）
How to derive the value of Pi
三角形的外角等于与其不相邻的两个内角之和
模版 - 無框黑板
線性規劃例15
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Tree Diagrams
Solids or 3D Shapes
Function Graph
Trigonometry
Perimeter