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三角形中特殊的線
Author:
+x sir
Topic:
Triangles
GeoGebra
New Resources
第八周作业
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
【案例】2013年安徽高考15题
Discover Resources
樞紐內容
量度的誤差 Errors in Measurement
溫室
DSE Circle-ACT01A Relationship between Chords and Centre of a Circle
法線 (The Normal Line)
Discover Topics
Piecewise Functions
Step Functions
Probability
General Quadrilateral
Median Value