Total Area of Multiple ObjectsDate: 07/18/2002 at 17:24:26 From: Susan Wahl Subject: square feet I have 6 windows and want to know the total square feet. Do I get the square footage of each window and then add them together OR do I get the measurements of each window (length by width), add all the lengths together, add all the widths together and then get the square footage? I get two different answers and don't know which one is correct. Thank you. Date: 07/19/2002 at 01:27:10 From: Doctor Jeremiah Subject: Re: square feet Hi Susan, You must do each window separately and then add the square footage together afterwards. Here is why: Say we have two windows. One is 3 feet by 4 feet and one is 5 feet by 2 feet: +----3----+ | | | | 4 12 | | | | | +---------+-------5-------+ | | 2 10 | | | +---------------+ See how much space is used up? 12+10=22 square feet. But if we add the measurements together before calculating area we get 3+5=8 feet by 4+2=6 feet. Clearly a window that is 8 feet by 6 feet is much bigger than the two individual windows: +----3----+-------5-------+ | | | | | 4 | | | | | | | +- -- --+-- -- -- -- + | | 2 | | | | +---------+---------------+ So the square footage of the windows would not be equal to the square footage of this huge thing. So do each window separately and then add the square footage together afterwards. I hope that helps. - Doctor Jeremiah, The Math Forum http://mathforum.org/dr.math/ Date: 07/19/2002 at 10:49:23 From: Susan Wahl Subject: Thank you (square feet) Thank you so very much for the prompt answer to my math question. What a wonderful website! So glad I found you. Thank you to everyone who donates their time and knowledge. |
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