Question

in triinghiul ABC, E apartine lui AB, F apartine lui AC. Daca EF paralel cu BC si:
a) AE=16, AB=28, EB=12, FC=9 calculati AF, AC

Answer 1

Aplicam TTh (teorema lui thales)
1. AE/EB=AF/FC
16/12=AF/9
12AF=16×9
AF=16×9/12=12cm

2. AE/AB=AF/AC
16/28=12/AC
16AC=28×12
AC=28×12/16
AC=21cm