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Quiz on Solving Right Triangles (Finding Angles) 解直角三角形：測驗2（求角度）
Author:
Alex CHIK
GeoGebra
gMath 互動數學教室
http://www.gmath.hk
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小数 的副本
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Discover Resources
test
圓的平移
some circles
數線上的中點公式
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Histogram
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