Odpowiedzi

2009-10-18T12:19:00+02:00
S= ([Xa+Xb]/2, [Ya+Yb]/2)
S=(3,-1)
(-3+Xb)/2=3 / *2
-3+Xb=6
Xb=6+3
Xb=9

(-5+Yb)/2=-1 /*2
-5+Yb=-2
Yb=-2+5
Yb=3

B=(9,3)
2009-10-18T12:23:22+02:00
S= ((xa+xb)/2, (ya+yb)/2)
S=(3,-1) A=(-3,-5)=(xa,ya)
(-3+xb):2=3 / *2
-3+xb=6
xb=6+3
xb=9

(-5+yb):2=-1 /*2
-5+yb=-2
yb=-2+5
yb=3

B=(9,3)