http://hi.baidu.com/%B2%BB%CF%C2%CB%AE%B5%C4%CE%DA%B9%EA/album/8如图,圆内接四边形ABCD中,∠A=90°,AB,DC的延长线相交与P,且AB=4,BC=1,AD=2倍根号3,求∠D=?
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![http://hi.baidu.com/%B2%BB%CF%C2%CB%AE%B5%C4%CE%DA%B9%EA/album/8如图,圆内接四边形ABCD中,∠A=90°,AB,DC的延长线相交与P,且AB=4,BC=1,AD=2倍根号3,求∠D=?](/uploads/image/z/652214-38-4.jpg?t=http%3A%2F%2Fhi.baidu.com%2F%25B2%25BB%25CF%25C2%25CB%25AE%25B5%25C4%25CE%25DA%25B9%25EA%2Falbum%2F8%E5%A6%82%E5%9B%BE%2C%E5%9C%86%E5%86%85%E6%8E%A5%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E4%B8%AD%2C%E2%88%A0A%3D90%C2%B0%2CAB%2CDC%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E7%9B%B8%E4%BA%A4%E4%B8%8EP%2C%E4%B8%94AB%3D4%2CBC%3D1%2CAD%3D2%E5%80%8D%E6%A0%B9%E5%8F%B73%2C%E6%B1%82%E2%88%A0D%3D%3F)
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