[tex]\text{P}=2\cdot(\text{ab}+\text{bc}+\text{ac})[/tex]
[tex]\text{a}=10 \ \text{cm}\\\\\text{b}=3,5 \ \text{cm}\\\\\text{c}=5 \ \text{cm}[/tex]
[tex]\text{P}=2\cdot(10 \ \text{cm}\cdot3,5 \ \text{cm}+3,5 \ \text{cm}\cdot5 \ \text{cm}+10 \ \text{cm}\cdot5 \ \text{cm})\\\\\text{P}=2\cdot(35 \ \text{cm}^2+17,5 \ \text{cm}^2+50 \ \text{cm}^2)\\\\\text{P}=2\cdot102,5 \ \text{cm}^2\\\\\huge\boxed{\text{P}=205 \ \text{cm}^2}[/tex]
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Pp = 5 * 3,5 = 17,5
Pb = 10 * 5 = 50
Pc = 4 * 50 + 2 * 17,5 = 235
[tex]\text{P}=2\cdot(\text{ab}+\text{bc}+\text{ac})[/tex]
[tex]\text{a}=10 \ \text{cm}\\\\\text{b}=3,5 \ \text{cm}\\\\\text{c}=5 \ \text{cm}[/tex]
[tex]\text{P}=2\cdot(10 \ \text{cm}\cdot3,5 \ \text{cm}+3,5 \ \text{cm}\cdot5 \ \text{cm}+10 \ \text{cm}\cdot5 \ \text{cm})\\\\\text{P}=2\cdot(35 \ \text{cm}^2+17,5 \ \text{cm}^2+50 \ \text{cm}^2)\\\\\text{P}=2\cdot102,5 \ \text{cm}^2\\\\\huge\boxed{\text{P}=205 \ \text{cm}^2}[/tex]