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Rotational and reflectional symmetry of a regular polygon
Author:
Ngan Hok Hei
,
lamanleung
GeoGebra
New Resources
球體建築師
四邊形的特性
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
【案例】2013年安徽高考15题
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滾出直線滾出直線
Q2-3
兩直線+圓
圓冪：到兩點的內積
GGB 案例分享
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Cosine
Similarity Transformation or Similarity
Scalene Triangles
Numbers
Reflection