Notam cele doua arii cu [tex]A_1[/tex] si [tex]A_2[/tex]
Notam cele doua perimetre cu [tex]P_1[/tex] si [tex]P_2[/tex]
a)
[tex]l_1=12,5\ cm\\\\A_1=(l_1)^2=156,25\ cm^2\\\\P_1=4l_1=50\ cm[/tex]
[tex]l_2=10,5\ cm\\\\A_2=(l_2)^2=110,25\ cm^2\\\\P_2=4l_2=42\ cm[/tex]
[tex]\frac{P_1}{P_2} =\frac{50}{42}=\frac{25}{21}[/tex]
[tex]\frac{A_1}{A_2} =\frac{156,25}{110,25} =\frac{625}{441}[/tex]
b)
[tex]l_1=\frac{6}{5} \ cm\\\\A_1=(l_1)^2=\frac{36}{25} \ cm^2\\\\P_1=4l_1=\frac{24}{5} \ cm[/tex]
[tex]l_2=\frac{18}{5} \ cm\\\\A_2=(l_2)^2=\frac{324}{25} \ cm^2\\\\P_2=4l_2=\frac{72}{5} \ cm[/tex]
[tex]\frac{P_1}{P_2} =\frac{24}{72}=\frac{1}{3}[/tex]
[tex]\frac{A_1}{A_2} =\frac{36}{324} =\frac{1}{9}[/tex]
Un alt exercitiu gasesti aici: https://brainly.ro/tema/27753
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