Resposta:

[tex]\textsf{Leia abaixo}[/tex]

Explicação passo a passo:

[tex]\mathsf{D^2 = C^2 \times L^2}[/tex]

[tex]\mathsf{(7,5\times2,54)^2 = C^2 \times 8^2}[/tex]

[tex]\mathsf{(19,05)^2 = C^2 \times 64}[/tex]

[tex]\mathsf{C^2 = 362,90 - 64}[/tex]

[tex]\mathsf{C^2 = 298,90}[/tex]

[tex]\mathsf{C = 17,29\:cm}[/tex]

[tex]\mathsf{A = C \times L}[/tex]

[tex]\mathsf{A = 17,29 \times 8}[/tex]

[tex]\boxed{\boxed{\mathsf{A = 138,31\:cm^2}}}[/tex]

Verified answer

Resposta:   138,31

polegada =2,54 cm

d=7,5 polegadas  =7,5 *2,54  = 19,05 cm

d²=x²+y²

19,05²=8²+y²

y²=19,05²-8²=298,9025

y=17,29 cm

A=x*y= 8*17,29 =138,32 cm²