如图△ABC中,AB=8,AC=6,D在AB上,且AD=5,在AC上取一点P,问AP为何值时,△APD与△ABC相似

△APD与△ABC
则：AP/AB=AD/AC
AP/8=5/6
AP=20/3.
或AP/AC=AD/AB
AP/6=5/8
AP=15/4.
AP为20/3或15/4时,△APD与△ABC相似.