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gjc102a14 三角形內的高
Author:
均一
GeoGebra
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兩位數除以一位數（一）
找出對稱軸
兩組對邊相等和有直角的四邊形
第八周作业
兩位數加法
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Geometry: Plane Figures (幾何： 平面圖像)
面積4
no10
正弦曲线的生成
存款試算工具
Discover Topics
Line Segment
Solids or 3D Shapes
Parallelogram
Cuboid
Plane Figures or Shapes