Răspuns :
ΔABC-echilateral
L=1,2 m
P¹=P².
ABCD-pătrat
___________
PΔABC=3L=3·1,2=3,6 m
PABCD=4L.
3,6=4L => L= 3,6:4=0,9 m
=> A pătrat= L² => A=0,9²=0,81 m
ΔABC-echilateral
L=1,2 m
P¹=P².
ABCD-pătrat
___________
PΔABC=3L=3·1,2=3,6 m
PABCD=4L.
3,6=4L => L= 3,6:4=0,9 m
=> A pătrat= L² => A=0,9²=0,81 m