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根據百分率找數量（一）: 例2
Author:
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
兩組對邊相等的四邊形
拼砌四邊形
sanjiaohanshu
四邉形 (四年級) 教師版
算柱 (兩位數)
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推移（y 方向）
根據百分率找數量（二）: 例3
裝飾用
Similar triangles in a triangle
a Geogebra file created by the first pre-service teacher