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You are not logged in. #1 20130710 08:16:23
rectangular prismsLet ABCDEFGH be a rectangular prism, as shown. The areas of faces ABCD, ABFE, and ADHE are 56, 110, and 385, respectively. Find the volume of the rectangular prism. I see you have graph paper. You must be plotting something #3 20130710 17:28:44
Re: rectangular prismshi cooljackiec, This time you cannot solve for a, b and c because there are only two equations. But you don't need to, because we only want to get There's a neat way to get this. Start with If you substitute in the values you know you'll be left with the value of a^2 + b^2 + c^2 Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #4 20130711 04:49:45
Re: rectangular prismshmmm... i used some weird guessing/intuition and got half of the correct answer of number 1... I see you have graph paper. You must be plotting something #5 20130711 06:40:06
Re: rectangular prismsHi cooljackiec;
That is how I get all my answers. Did you check the answer? In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #6 20130711 08:02:22
Re: rectangular prismsyes, yours was correct I see you have graph paper. You must be plotting something #7 20130711 08:08:40
Re: rectangular prismsOver at Brilliant  AOPS they say "Work smarter, not harder." But where does that leave guys like me?
I say, take thinking out of the solution, it only gets you into trouble. Do not follow Karl Maldens advice, I say leave your brain at home, travel light! In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. 