ABCD=tr. is.
M,N apartin [CD]
AM perpendicular CD
BN perpendicular CD
DM=5 cm
AM=6 cm
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ln. mj= ?
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AM perpendicular CD =>AM= h (inaltime)
Facem la fel si pentru perpendiculara BN
BN perpendicular CD=>BN=h (inaltime)
AB paralel MN ====>ABMN= PATRAT=>AB=BN=MN=AM=6 cm
AM paralel BN ====>
DC=DM+MN+NC
ABCD=tr.is.=> DM=NC=5 cm
DC=5 cm+6 cm+5 cm
DC=16 cm
EF (o vei trasa tu)= (AB+CD)/2
EF=(6 cm+16 cm)/2
EF=11 CM
Sper ca ti-am fost de folos!!!