[tex]Zadanie\\\\Wspolrzedne\ srodka\ odcinka\ AB\\\\S_{AB}=(\frac{x_A+x_B}{2}\ ;\ \frac{y_A+y_B}{2})\\\\a)\\\\K=(1,18),\ L=(3,24)\\\\S=(\frac{1+3}{2}\ ;\frac{18+24}{2})= (\frac{4}{2}\ ;\frac{42}{2})=(2,21)\\\\b)\\\\A=(3,-7),\ B=(-1,-1)\\\\S=(\frac{3+(-1)}{2}\ ;\ \frac{-7+(-1)}{2})=(\frac{2}{2}\ ;\ \frac{-8}{2})=(1,-4)\\\\c)\\\\A=(-5,-5),\ B=(3,11)\\\\S= (\frac{-5+3}{2}\ ;\ \frac{-5+11}{2})=(\frac{-2}{2}\ ;\ \frac{6}{2})=(-1,3)[/tex]
