若△ABC三边长分别为根号m²+16n²,根号9m²+4n²,根号4m²+4n²,(m>0,n>0,且m形的面积.
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![若△ABC三边长分别为根号m²+16n²,根号9m²+4n²,根号4m²+4n²,(m>0,n>0,且m形的面积.](/uploads/image/z/12651459-51-9.jpg?t=%E8%8B%A5%E2%96%B3ABC%E4%B8%89%E8%BE%B9%E9%95%BF%E5%88%86%E5%88%AB%E4%B8%BA%E6%A0%B9%E5%8F%B7m%26%23178%3B%2B16n%26%23178%3B%2C%E6%A0%B9%E5%8F%B79m%26%23178%3B%2B4n%26%23178%3B%2C%E6%A0%B9%E5%8F%B74m%26%23178%3B%2B4n%26%23178%3B%2C%28m%EF%BC%9E0%2Cn%EF%BC%9E0%2C%E4%B8%94m%E5%BD%A2%E7%9A%84%E9%9D%A2%E7%A7%AF.)
若△ABC三边长分别为根号m²+16n²,根号9m²+4n²,根号4m²+4n²,(m>0,n>0,且m形的面积.
若△ABC三边长分别为根号m²+16n²,根号9m²+4n²,根号4m²+4n²,(m>0,n>0,且m
形的面积.
若△ABC三边长分别为根号m²+16n²,根号9m²+4n²,根号4m²+4n²,(m>0,n>0,且m形的面积.
如图
S△ABC
=3m*4n-2n*2m/2-2n*3m/2-4n*m/2
=12mn-2mn-3mn-2mn
=5mn