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Learn01
Author:
June Guam
GeoGebra
三角形ABC,E、F分别是AB、AC的中点,通过E、F分别作垂线交于点D。 证明:AD=BD。
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GeoGebra数学资源(4-8年级)
盈利與虧蝕
第八周作业2
比較五件物件的重量
常见四边形是否是双心四边形
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No.5
正四角錐
正n凸多邊形旋轉對稱/反射對稱
Similar triangles reasons 2
翰林數學_2下_CH3-2_SAS作圖
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Stochastic Process or Random Process
Orthocenter
Perimeter
Trapezoid
Arithmetic Mean