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平行四边形个数
Author:
朱亮
Topic:
Parallelogram
GeoGebra
New Resources
三位數除以一位數(一)
三位數除以一位數(二)
兩位數加法
【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
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waaachen
林書豪加油
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slide base
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