Question

Laturile unui triunghi sunt direct proportionale cu numerele 8,15,12. Calculati perimetrul triunghiului , stiind ca cea mai mare latura este egala cu 45 cm.Va rog... rezolvari complete!!!!!!*)))))))msssyyy!!!#))))

Answer 1

$a,b,c \to laturile \ \Delta \\\\ 8; \ 15; \ 12; \ \ \ \ (D.P) \\\\ \frac{a}{8}=\frac{b}{15}=\frac{c}{12}=k \\\\\ a=8k \\ b=15k \\ c=12k \\\\ \boxed{\boxed{b=45}} \\\\ 15k=45 \ |:15 \\\\ \boxed{k=3} \\\\ a=3*8 \\\\ \boxed{\boxed{a=24}} \\\\ c=12*3 \\\\ \boxed{\boxed{c=36}} \\\\ P\Delta= 45+36+24 \\\\ \boxed{\boxed{\boxed{P \Delta=105}}}}$