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20170724GGB
20170724GGB
Author:
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Nested spiral octagon
判斷球體
兩組對邊相等和有直角的四邊形
近似值：有效數字
球體建築師
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畫三角形 題3a
認識小數
四点共圆
試算表應用
B3C2-2例6-1
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Linear Equations
Right Triangles
Real Numbers
Expected Value
Multiplication