Algebra/Geometry

I am eating a snow cone in a paper cone with a height of 21cm and the radius of my snow cone ice is 3.25 cm.
Find the amount of material needed to make my paper snow cone

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  1. I forgot to say this. What formula am I suppose to use? The one to find surface area?

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  2. Since this is not my area of expertise, I searched Google under the key words "cone area" to get these possible sources:

    http://math.about.com/od/formulas/ss/surfaceareavol_2.htm
    http://www.uwm.edu/~ericskey/TANOTES/Geometry/node15.html
    http://www.webcalc.net/calc/0040_help.php
    http://www.rdrop.com/~half/math/cone/surface.area.xhtml
    http://www.mathsteacher.com.au/year10/ch14_measurement/18_cone/20cone.htm

    In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

    I hope this helps. Thanks for asking.

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    posted by PsyDAG
  3. i have homework and we have to name this shape below and note one of it's specal properties;i have traiedlooking on pc but i don't know the name of it;have eney one got an idear.r.s.v.p. Sophie-opel evan

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    posted by sophie

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