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Tangent perpendicular to radius
Author:
Big Lee
GeoGebra
New Resources
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
畫出對稱圖形
兩位數除以一位數（一）
【案例】2013年安徽高考15题
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底數介於0到1之間指對數函數交點情形
Tangent of a Circle 圓的切線
venn图着色
中心投影、平行投影
dingding_test
Discover Topics
Polygons
Circle
Bar Chart or Bar Graph
Unit Circle
Arithmetic