t为何值时四边形PQCD为平行四边形、等腰梯形?:如图在直角梯形ABCD中,AD//BC,∠B=90度,AB=8CM,AD=24CM,BC=26.AB为圆O的直径,动点P从A点开始沿AD变向点D以1cm/s的速度移动,动点Q从点C开始沿CB变向
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![t为何值时四边形PQCD为平行四边形、等腰梯形?:如图在直角梯形ABCD中,AD//BC,∠B=90度,AB=8CM,AD=24CM,BC=26.AB为圆O的直径,动点P从A点开始沿AD变向点D以1cm/s的速度移动,动点Q从点C开始沿CB变向](/uploads/image/z/12351265-25-5.jpg?t=t%E4%B8%BA%E4%BD%95%E5%80%BC%E6%97%B6%E5%9B%9B%E8%BE%B9%E5%BD%A2PQCD%E4%B8%BA%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2%E3%80%81%E7%AD%89%E8%85%B0%E6%A2%AF%E5%BD%A2%3F%3A%E5%A6%82%E5%9B%BE%E5%9C%A8%E7%9B%B4%E8%A7%92%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%EF%BC%8CAD%2F%2FBC%EF%BC%8C%E2%88%A0B%3D90%E5%BA%A6%EF%BC%8CAB%3D8CM%2CAD%3D24CM%2CBC%3D26.AB%E4%B8%BA%E5%9C%86O%E7%9A%84%E7%9B%B4%E5%BE%84%EF%BC%8C%E5%8A%A8%E7%82%B9P%E4%BB%8EA%E7%82%B9%E5%BC%80%E5%A7%8B%E6%B2%BFAD%E5%8F%98%E5%90%91%E7%82%B9D%E4%BB%A51cm%2Fs%E7%9A%84%E9%80%9F%E5%BA%A6%E7%A7%BB%E5%8A%A8%EF%BC%8C%E5%8A%A8%E7%82%B9Q%E4%BB%8E%E7%82%B9C%E5%BC%80%E5%A7%8B%E6%B2%BFCB%E5%8F%98%E5%90%91)
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