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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