Răspuns :
Răspuns:
1 dm= 10cm,2dm=20cm
20cm-7cm=13cm
Raspunsul 6,5cm
P=2Ll
l=P-L:2
l=20cm-7cm:2=13cm:2=6,5cm
P=2Ll
l=P-L:2
l=20cm-7cm:2=13cm:2=6,5cm
Răspuns:
1 dm= 10cm,2dm=20cm
20cm-7cm=13cm