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Copy of 分數與小數
Author:
Thomas Lau
,
###
,
GeoGebra Institute of Hong Kong
GeoGebra
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兩組對邊相等的四邊形
四邊形的特性
近似值：有效數字
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
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蝴蝶線ggb
上課用
Ext angle cyclic quad
中位线的副本
变化的三角形的旁心.许兴华数学
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Triangles
Percentages
Angles
Division
Rotation