如图,△ABC中,∠A=90,AB=AC=1,P是AB上不与 A、B重合的一个动点,PQ⊥BC于Q,QR⊥AC于R.如图,△ABC中,∠A=90,AB=AC=1,P是AB上不与A、B重合的一个动点,PQ⊥BC于Q,QR⊥AC于R.(1)求证:PQ= BQ;(2)设BP的长为x,四边
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![如图,△ABC中,∠A=90,AB=AC=1,P是AB上不与 A、B重合的一个动点,PQ⊥BC于Q,QR⊥AC于R.如图,△ABC中,∠A=90,AB=AC=1,P是AB上不与A、B重合的一个动点,PQ⊥BC于Q,QR⊥AC于R.(1)求证:PQ= BQ;(2)设BP的长为x,四边](/uploads/image/z/8703867-3-7.jpg?t=%E5%A6%82%E5%9B%BE%2C%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0A%3D90%2CAB%3DAC%3D1%2CP%E6%98%AFAB%E4%B8%8A%E4%B8%8D%E4%B8%8E+A%E3%80%81B%E9%87%8D%E5%90%88%E7%9A%84%E4%B8%80%E4%B8%AA%E5%8A%A8%E7%82%B9%2CPQ%E2%8A%A5BC%E4%BA%8EQ%2CQR%E2%8A%A5AC%E4%BA%8ER%EF%BC%8E%E5%A6%82%E5%9B%BE%2C%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0A%3D90%2CAB%3DAC%3D1%2CP%E6%98%AFAB%E4%B8%8A%E4%B8%8D%E4%B8%8EA%E3%80%81B%E9%87%8D%E5%90%88%E7%9A%84%E4%B8%80%E4%B8%AA%E5%8A%A8%E7%82%B9%2CPQ%E2%8A%A5BC%E4%BA%8EQ%2CQR%E2%8A%A5AC%E4%BA%8ER%EF%BC%8E%281%29%E6%B1%82%E8%AF%81%EF%BC%9APQ%3D+BQ%EF%BC%9B%282%29%E8%AE%BEBP%E7%9A%84%E9%95%BF%E4%B8%BAx%2C%E5%9B%9B%E8%BE%B9)
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