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Calculati perimetrul unui patrat ce are latura egala cu:
a)0.4 dam
b)1.7 cm
c)3.24 mm


Răspuns :

a)l=0,4dam
P=0,4*4=1,6dam
b)l=1,7cm
P=1,7*4=6,8cm
c)l=3,24mm
P=3,24*4=12,96mm
a)A=l²
A=0,4²dam
A=0,16 dam²
P=0,4x4=1.6cm
b) A=1.7²cm
A=2.89cm²
P=4x1.7=6,8cm
c)A=3,24²mm
A=10.4976mm²
P=3,24x4=12.96cm