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正20面體展開
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GEOGEBRA啟
GeoGebra
New Resources
兩位數加法
拼砌四邊形
算柱 (兩位數)
三位數除以一位數（二）
兩組對邊相等的四邊形
Discover Resources
Roger Test Draw
最小周長
平面幾何的思考
阿基米德多面體
中位线的副本
Discover Topics
Rhombus
Orthocenter
Arithmetic
Cone
Arithmetic Mean