[數學]座標化....
由 等待著的深藍 於 星期二 一月 23, 2007 12:20 am
#ed_op#DIV#ed_cl#設B(0,0),C(0,2),D(0,2),A(1,h)#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#依題意,BM#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl#=(1/2)#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl#+[(2+h)/2]#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl#=1#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl#,DM#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl#=(3/2)#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl#+[(2+h)/2]#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#Then BM#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl#-DM#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl#=1/4-9/4⇒DM#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl#=1#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl#+9/4-1/4=3⇒DM=√3#ed_op#/DIV#ed_cl#