Răspuns
Explicație pas cu pas:
1) a) Daca RS║NP => ΔMRS asemenea ΔMNP => MR/MN=MS/MP=RS/NP
b) Daca AB║DE => ΔDEC asemenea ΔABC => CD/CA=CE/CB=DE/AB
c) Daca FE║PQ=> PQO asemenea ΔFEO => PQ/FE=OQ/OE=OP/OF
d) Daca MN║CE => ΔDMN asemenea ΔDCE => DN/DE=DM/DC=MN/CE
e) Daca AB║CD => ΔAOB asemenea ΔDOC => AO/OD=OB/OC=AB/CD.
f) Daca DE║CA => ΔDEB asemenea ΔCAB => DE/CA=EB/AB=DB/CB.
