olivia981 olivia981
  • 03-03-2019
  • Mathematics
contestada

Find the surface area of the cone in terms of pi.

Find the surface area of the cone in terms of pi class=

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carlosego
carlosego carlosego
  • 03-03-2019

Answer: THE LAST OPTION

Step-by-step explanation:

The formula for calcualte the surface area of a cone is the shown below:

[tex]SA=rs\pi+r^{2}\pi[/tex]

Where s is the slant height and r is the radius.

You can see in the figure that s=21ft  and the r=12ft.

Then when you substitute values, you obtain that the result is:

[tex]SA=(12ft)(21ft)\pi+(12ft)^{2}\pi=396\pi[/tex]ft²

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Аноним Аноним
  • 03-03-2019

Answer:

your answer is D the last option

Step-by-step explanation:

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