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折扣 例4的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
第八周作业
找出對稱軸
画直线等分三角形的面积
異分母分數減法
三位數除以一位數（一）
Discover Resources
絕對值距離和
七巧板(底板)_李樂雯
Angle between a Line and a Plane
圓外切四邊形
跳棋棋盘
Discover Topics
Tangent Function
Secant Line or Secant
Sine
Polygons
Similarity Transformation or Similarity