timothyngyf – Resources – GeoGebra

F5_聯立二元一次不等式
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F1_Ch11.4_判定相似三角形
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F5__二元一次不等式
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F2_Ch11.2_三角學(邊長與角的關係)
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F2_Ch11.1_三角學(對鄰斜)
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F2_Ch11.1_三角學(對鄰斜)
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timothyngyf
量度與誤差2018
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Chord, Arc, Sector and Segment
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弦,弧,扇形,弓形
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量度與誤差
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timothyngyf