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相切的三圓
Author:
高淑蓉
GeoGebra
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兩位數除以一位數（二）
兩位數除以一位數（一）
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
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畫三角形 題1a
Prism and Cylinder
Area and Volume of a triangular prism(三角柱體的面積和體積)
翹翹板
中国纸质灯笼
Discover Topics
Parallelogram
Quadratic Functions
Means
Volume
Median Line