Question

calculeaza perimetrul unui triunghi,daca laturile sale sunt respectiv 72 cm,124 cm,56 cm.

Answer 1

$P=a+b+c \\ a=72 \ cm, \ b=124 \ cm, \ c=56 \ cm \\ P=72 \ cm+124 \ cm+56 \ cm \\ \Righarrow \boxed{\bold{P=252 \ cm}}.$

Answer 2

P=L1+L2+L3
P= 72+124+56
P=252