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Angle Between Two Planes Definition 平面與平面間之交角 定義
Author:
Steven S. H. Chu
GeoGebra
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異分母分數減法
三位數除以一位數（一）
【案例】2018年全国1卷理科12题
畫出對稱圖形
找出對稱軸
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「ASS」
費氏螺旋 (試算表)
公切線(配合Dilate指令)
包絡線
三角函數的繪圖1
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Percentages
Fractal Geometry
Area
Parallelogram
Ratios