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Introduce Tangent Ratio
Author:
VCChung
GeoGebra
New Resources
三位數除以一位數（一）
【案例】2013年安徽高考15题
拼砌四邊形
直角坐標平面上的旋轉變換
兩組對邊相等的四邊形
Discover Resources
畢氏定理動態證明(劉徽)
tool
線性規劃例15
解題三
分數化百分數(預習)
Discover Topics
Quadrilaterals
Straight Lines
Natural Numbers
Ellipse
Pythagoras or Pythagorean Theorem