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Proof77 - 楊筑雯

Author:郭亮偉

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兩位數除以一位數（二）
兩組對邊相等的四邊形
近似值：有效數字
sanjiaohanshu
兩組對邊相等和有直角的四邊形

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橢圓尺規作圖Ex01
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Pyramid
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