AB=12 m
BE=4 m
BD=3 m
DE=5 m
BC║DE
ΔABC~ΔBED
[tex]\frac{EB}{AB}=\frac{ED}{BC}=\frac{BD}{AC}[/tex]
[tex]\frac{4}{12}=\frac{5}{BC}=\frac{3}{AC}[/tex]
BC=15 m
AC=9 m
[tex]A_{ABC}=\frac{AC\cdot AB}{2} =\frac{9\cdot 12}{2} =54\ m^2[/tex]
Un alt exercitiu de geometrie gasesti aici: https://brainly.ro/tema/1021033
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