Răspuns :
[tex] \frac{Aria disc}{L cerc} = \frac{ \pi r^{2} }{2 \pi r}= \frac{r}{2} = \frac{8}{2}=4 [/tex]
A cerc =
[tex]\pi \: r {}^{2} = 8 {}^{2} \pi = 64 \pi [/tex]
Lungime cerc =
[tex]2\pi \: r = 16\pi[/tex]
Raportul =
[tex] \frac{64\pi}{16\pi} = 4cm[/tex]
[tex]\pi \: r {}^{2} = 8 {}^{2} \pi = 64 \pi [/tex]
Lungime cerc =
[tex]2\pi \: r = 16\pi[/tex]
Raportul =
[tex] \frac{64\pi}{16\pi} = 4cm[/tex]