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- odcinek AB:
3/6 = 2/x,
x = 6 * 2/3
x = 4
IABI = 2+4
IABI = 6
-odcinek CD:
7,2/2,4 =4,5/y
y =2 4 * 4,5/7,2
y =1,5
ICDI = 4,5+1,5
ICDI = 6
- odcinek EF:
3/9 =2/z
z = 9 *2/3
z = 6
IEFI = 2+ 6
IEFI = 8