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过圆上一点作切线，三步
Author:
u.jianwang
GeoGebra
New Resources
柱體建築師
直角坐標平面上的旋轉變換
第八周作业
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
Discover Resources
拋物線聖路易拱門
雙搖桿
正三角形
Ex5D#8
疊代
Discover Topics
Circle
Differential Equation
Polynomial Functions
Sphere
Pythagoras or Pythagorean Theorem