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四邊形面積問題
Author:
連琨銘
GeoGebra
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兩位數加法
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
四邉形 (四年級) 教師版
第八周作业
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Tractrix surface
glt-h02-03-角錐角柱動態展開
內公切線長
橢圓練習
ptccs2new3
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Addition
Step Functions
Rhombus
Quadrilaterals