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外凸四边形
Author:
数豆豆
GeoGebra
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常见四边形是否是双心四边形
第八周作业
双心四边形
第八周作业2
科氏力 (Coriolis Force)
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Quiz on Solving Right Triangles (Combined) 解直角三角形：合併測驗
(3D) Tasks: Pyramid, Paper folding & Solid of revolution[20170615]
因數（1至24）
a sin(bx+c) + d 的圖形 的複本
內含正方形的正方形
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Arithmetic
Function Graph
Translation
Geometric Transformations
Parametric Curves