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Tangent and normal
Author:
kidmancmw
GeoGebra
New Resources
錐體建築師
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
拼砌四邊形
兩位數除以一位數（一）
Discover Resources
以 Unit Circle 了解 Sine 的正/負
三角函數 Cos X 函數圖形
圆心角和圆周角
簡易畢氏訂裡面積分割證明法
平行四邊形面積
Discover Topics
Unit Circle
Translation
Piecewise Functions
Trigonometry
Sequences and Series