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Old 09-01-2007   #61
Sillysidley

 
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No, it's
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Old 09-01-2007   #62
Temperal
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Fine, whatever. Next question.
 
Old 09-01-2007   #63
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Quote:
Originally Posted by pianoforte View Post
Find area of triangle with vertices the intersections of lines
y=3x+8, y=(1/2)x-5, 3+2x+2y=0.
*cough*
 
Old 09-02-2007   #64
Temperal
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Quote:
Originally Posted by pianoforte View Post
*cough*
Did you just make up random equations? Those numbers come out very non-whole.
 
Old 09-02-2007   #65
Sillysidley

 
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VERY non-whole. All you do is put them in slope intercept form, put two of them at a time to be equal, find the coordinates that way, and use shoelace or whatever method you want to.
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Old 09-02-2007   #66
Temperal
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Do we really have to solve the problem? Come on, I mean...
 
Old 09-02-2007   #67
Sillysidley

 
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Do we have to do all that "figuring out" stuff
/whine
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Old 09-08-2007   #68
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\sigh This is a long one. Time to play with graphing programs.

So you have three sets of linear equations for each vertex of the triangle. Each solution for each on is
So take the midpoint of and which is . Now take the distance between the midpoint and two endpoints, and multiply the two distances and divide by two to get the answer.


I have to go soon so someone can finish it up.
 
Old 10-29-2007   #69
Temperal
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Eh, I decided to revive this thread.

Find the volume of a tetrahedron with a surface area of 361 square meters.
 
Old 10-29-2007   #70
Sillysidley

 
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Regular or not?
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