anonymous
  • anonymous
surface area of a cone? 12cm high and radius is 5 answer options are 90 pi 65pi 120pi 115pi
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
90 pi
amistre64
  • amistre64
or.... pi(r) sqrt(r^2 + h^2)
amistre64
  • amistre64
5pi sqrt(169) 5*13pi = 65pi

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amistre64
  • amistre64
its either that or 90; i cant recall if surface area includes the base area or not
anonymous
  • anonymous
90!
anonymous
  • anonymous
[Base Area] + 1/2 × Perimeter × [Slant Length]

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