1、在△ABC中,AB=20cm,AC=13cm,BC边上的高AD=12,求BC的边长2、在Rt△中,∠A、∠B、∠C的对边分别是a、b、c且a:b=5:12,c=26,则a=_____,b=_____.3、在Rt△ABC中,斜边AB=2,则AB²+BC²+CA²=____
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![1、在△ABC中,AB=20cm,AC=13cm,BC边上的高AD=12,求BC的边长2、在Rt△中,∠A、∠B、∠C的对边分别是a、b、c且a:b=5:12,c=26,则a=_____,b=_____.3、在Rt△ABC中,斜边AB=2,则AB²+BC²+CA²=____](/uploads/image/z/5031904-40-4.jpg?t=1%E3%80%81%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3D20cm%2CAC%3D13cm%2CBC%E8%BE%B9%E4%B8%8A%E7%9A%84%E9%AB%98AD%3D12%2C%E6%B1%82BC%E7%9A%84%E8%BE%B9%E9%95%BF2%E3%80%81%E5%9C%A8Rt%E2%96%B3%E4%B8%AD%2C%E2%88%A0A%E3%80%81%E2%88%A0B%E3%80%81%E2%88%A0C%E7%9A%84%E5%AF%B9%E8%BE%B9%E5%88%86%E5%88%AB%E6%98%AFa%E3%80%81b%E3%80%81c%E4%B8%94a%EF%BC%9Ab%3D5%EF%BC%9A12%2Cc%3D26%2C%E5%88%99a%3D_____%2Cb%3D_____.3%E3%80%81%E5%9C%A8Rt%E2%96%B3ABC%E4%B8%AD%2C%E6%96%9C%E8%BE%B9AB%3D2%2C%E5%88%99AB%26sup2%3B%2BBC%26sup2%3B%2BCA%26sup2%3B%3D____)
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