Posted by brianna on Monday, January 5, 2009 at 7:02pm.
the ? says "a cone has the surface area of 160 sq. in. If the dimensions are reduced by 1/2,what is the surface area of the new cone?" i just cant seem to find the formula for the surface area of the cone.

math(again)  Ms. Sue, Monday, January 5, 2009 at 7:08pm
Check this site.
http://math.about.com/od/formulas/ss/surfaceareavol_2.htm

math(again)  bobpursley, Monday, January 5, 2009 at 7:09pm
Surface area cone:
TOP: 1/2 (circumfirance of bottom x height)
= 1/2 (PI*radius x height)
So if you ignore the bottom of the cone, then reducing the dimensions by 1/2...

math(again)  brianna, Monday, January 5, 2009 at 7:10pm
thanks for helping me
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