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Tangent of a Circle 圓的切線
Author:
Alex CHIK
GeoGebra
gMath 互動數學教室
http://www.geogebra.hk
New Resources
直線的斜率
祖冲之的期望：内棋与外棋
圓的切線方程
平行線的斜率
第八周作业2
Discover Resources
判斷柱體 3
不規則圖形的周界(凹)
square and circle
四下_面積（一）(學生版)
Twghmkc_運動與我
Discover Topics
Upper and Lower Sum or Riemann Sum
Equilateral Triangles
Cone
Pythagoras or Pythagorean Theorem
Circle