Seudónimo Seudónimo
  • 19-04-2018
  • Mathematics
contestada

please help, thank you.

please help thank you class=

Respuesta :

hudadagra hudadagra
  • 19-04-2018
We need the radius to find the surface area. Since we have the circumference we can use that to find the radius.

C = 2πr
23 = 2(3.14)r
23 = 6.28r
23/6.28 = r 
3.66 = r

Now use the radius to find the surface area.

SA = 4πr²
SA = 4(3.14)(3.66)²
SA = 168.33 

Surface area is C. 168 cm²

Hope this helps :)
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