初三数学相似三角形的题如图所示,在直角梯形ABCD中,AB‖CD,∠A=90°,AB=2,DC=3,AD=7,P为AD上一点,以P、A、B为顶点的三角形与以P、C、D为顶点的三角形相似,这样的P点有几个?并求出P点与A点的距离.
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![初三数学相似三角形的题如图所示,在直角梯形ABCD中,AB‖CD,∠A=90°,AB=2,DC=3,AD=7,P为AD上一点,以P、A、B为顶点的三角形与以P、C、D为顶点的三角形相似,这样的P点有几个?并求出P点与A点的距离.](/uploads/image/z/4102590-30-0.jpg?t=%E5%88%9D%E4%B8%89%E6%95%B0%E5%AD%A6%E7%9B%B8%E4%BC%BC%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E9%A2%98%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E5%9C%A8%E7%9B%B4%E8%A7%92%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAB%E2%80%96CD%2C%E2%88%A0A%3D90%C2%B0%2CAB%3D2%2CDC%3D3%2CAD%3D7%2CP%E4%B8%BAAD%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E4%BB%A5P%E3%80%81A%E3%80%81B%E4%B8%BA%E9%A1%B6%E7%82%B9%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2%E4%B8%8E%E4%BB%A5P%E3%80%81C%E3%80%81D%E4%B8%BA%E9%A1%B6%E7%82%B9%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9B%B8%E4%BC%BC%2C%E8%BF%99%E6%A0%B7%E7%9A%84P%E7%82%B9%E6%9C%89%E5%87%A0%E4%B8%AA%3F%E5%B9%B6%E6%B1%82%E5%87%BAP%E7%82%B9%E4%B8%8EA%E7%82%B9%E7%9A%84%E8%B7%9D%E7%A6%BB.)
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