1. a) AC = CD
FE = ED
b) AC=CD
FC= CG
FE= EH
2. a) AM = MN = NO
OP=PQ=OR
b) EB =BF =FG
DF= FH =HI
3. H'I' - linie mijlocie
XY - linie mijlocie in QRS
J'K' - linie mijlocie in RSJ'K'