December 2018 1 174 Report

€ - APARTINE // - PARALEL
1.Consideram triungiul ABC si punctul M € (AB). Construim ME//AC, E € (BC) si MF//BC, F (AC). Daca  \frac{BM}{MA} = \frac{3}{4} , BC=21cm si AC=14 cm, aflati perimetrul paralelogramului MECF.
2. In triunghiul ABC, consideram punctele D € BC, E € AC, astfel incat DE//AB.
a) Calculati AC, daca D € (BC), AE+AC=28cm, BC=12 cm si DB=9 cm.
b) Calculati AE, daca B (CD),  \frac{CB}{CD} = \frac{5}{8} si EC=16 cm.







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