E ETimeFly Unregistered / Unconfirmed GUEST, unregistred user! 2003-03-04 #3 具体??? 已知△的三边为a,b,c,其面积S=????
Z zw84611 Unregistered / Unconfirmed GUEST, unregistred user! 2003-03-04 #4 S=sqrt(x(x-a)(x-b)(x-c)) 其中:x=(a+b+c)/2
E ETimeFly Unregistered / Unconfirmed GUEST, unregistred user! 2003-03-04 #6 错了吧!! 如果a=3 b=4 c=5 s=(a*b)/2=6 按你的公式,S=sqrt(6)
Z zw84611 Unregistered / Unconfirmed GUEST, unregistred user! 2003-03-04 #7 S=sqrt(x(x-a)(x-b)(x-c)) 其中:x=(a+b+c)/2 刚刚漏了个x