# Need help finding surface area

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• Mar 5th 2012, 11:44 AM
pinny
Need help finding surface area
I'm reviewing in preparation of the last test. I guess I'm having some problems with this geometry question. I know the formulas for both objects I'm just not sure how to put them together since the triangle will have the base of the rectangle. So, I'm uncertain with what adjustments need to be made with the traditional math formula

Any help is appreciated
• Mar 5th 2012, 03:18 PM
bjhopper
Re: Need help finding surface area
There are 8 surfaces in the house subject to outside weather.Area of rectangle = L*W. Area of triangle =1/2 * base *height. Four of them have congruent mates.Take 2 of A,2ofB,2of C and 2 of D.Calculate the slant height of roof using Pythagoran T
• Mar 5th 2012, 07:44 PM
pinny
Re: Need help finding surface area
Thanks for the reply bjhopper

Should i not cover the entire area of the rectangle with 2(wh+1w+lh)
2(19)(18)+(19)(22)+(18)
I included the Pythagoran part
• Mar 6th 2012, 04:52 AM
bjhopper
Re: Need help finding surface area
A 2*18*22
B 2*19*18
C 2*1/2*14*19
D 2*22* slant h of roof
Sum of above
• Mar 6th 2012, 10:58 AM
pinny
Re: Need help finding surface area
thanks for the help Bjhopper it's greatly appreciated