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圓內接四邊形任務一: 提示一
Author:
Stanley Mak
GeoGebra
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【案例】2018年全国1卷理科12题
三位數除以一位數（一）
異分母分數減法
近似值：有效數字
兩組對邊相等和有直角的四邊形
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Copy of 七巧板
斜線2
假的龍珠
示例2
二次函数y=a(x-h)^2+k各参数性质
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Geometric Transformations
Matrices
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