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已知正三角形內部一點到三頂點距離求面積
Author:
連琨銘
GeoGebra
New Resources
找出對稱軸
柱體建築師
異分母分數減法
兩位數除以一位數（一）
直角坐標平面上的旋轉變換
Discover Resources
垂心即內心
Is this a prism 7
Copy of 展開圓面積 (講義版)
S408 Penrose 階梯
正方形雪花图案
Discover Topics
Bar Chart or Bar Graph
Angles
Straight Lines
Incircle or Inscribed Circle
Confidence Interval