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Tangent perpendicular to radius
Author:
Big Lee
GeoGebra
New Resources
拼砌四邊形
第八周作业
判斷球體
兩組對邊相等的四邊形
兩位數除以一位數（一）
Discover Resources
waaachen
推移（y 方向）
三節棍
Tangent to a curve at a point
球面坐標
Discover Topics
Expected Value
Square
Means
Parallelogram
Plane Figures or Shapes