Răspuns:
AR/AB=AS/AC
AR/AP=AS/AQ
AR/AM=AS/AM
AP/AB=AQ/AC
AS/AQ=AR/AP
CN/CA=BM/BA
CQ/AQ=BP/AP
b)Triunghiul ABC
BC=24cm.
M€AB. > MN=linie mijlocie -> MN=BC/2
N€AC. =24/2=12cm
Faci asa si cu celelalte!Succes!