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Author:
wang3213
GeoGebra
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兩位數除以一位數(一)
算柱 (兩位數)
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
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複息的威力
翰林B4講p171_類8
Arbelos
任意四边形各边中点的连线必构成平行四边形.许兴华数学
coterminal angles
Discover Topics
Multiplication
Orthocenter
Symmetry
Solids or 3D Shapes
Cone