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GeoGebra
PMC 2011-12 Q5
Author:
Arthur Lee
題目三
(a) 移動圖中B點，並觀察線段AB及PQ的長度變化與關係。當AB長40km時，PQ應長多小？ (b) 當AB與PQ的長度相等時，它們的長度是多小？
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