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練習 - 逆時針旋轉（三角形）
Author:
Lau Sir
Topic:
Triangles
GeoGebra
New Resources
第八周作业
拼砌四邊形
直角坐標平面上的旋轉變換
兩位數除以一位數（一）
四邉形 (四年級) 教師版
Discover Resources
弧度與角度
分數(約分)
指對數交點
Trigonometric Ratios of Any Angle
放大／縮小 Resize
Discover Topics
Differential Equation
Root
Parabola
Cosine
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