a)
[tex]3 \times 3 = 9 \: p = 9cm2[/tex]
O =
[tex]3 + 3 + 3 + 3 = 12cm[/tex]
B)
[tex]2 \times 4 = 8dm {}^{2} \: \: \: p = 8dm {}^{2} [/tex]
O=
[tex]2 + 2 + 4 + 4 = 12dm[/tex]
c)
[tex]7 + 7 \times 4 \div \frac{1}{2} = 14 \times 2 = 28cm {}^{2} \: \: \: \: p = 28cm {}^{2} [/tex]
O=
[tex]5 + 5 + 7 + 7 = 24cm[/tex]
:) proszę
