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BEES定理2
Author:
martic1101
GeoGebra
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兩組對邊相等和有直角的四邊形
算柱 (兩位數)
兩位數除以一位數（二）
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
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三角形面積
P2 math
拋物線教學_2016
(004)80201辛宇婕
变化的三角形的垂心.许兴华数学
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Vectors
Area
Rotation
Conic Sections
Constructions