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題10
Author:
GeoGebra Institute of Hong Kong
GeoGebra
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兩組對邊相等的四邊形
找出對稱軸
三位數除以一位數（一）
畫出對稱圖形
兩組對邊相等和有直角的四邊形
Discover Resources
三角形三邊大小關係(國小五上翰林4-1)
面鏡的反射
Angles in a Circle:Property 3
例题2（P点可拖动）
畫出對稱圖形
Discover Topics
Cosine
Statistics
Intersection
Trigonometry
Means