About mathematic :-)?
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Short Answer:\nThe diagonal line or hypotenuse is not a straight line.  It bends either way thus both figures are NOT triangles.\n\nLong answer:\n\nThe two diagrams are not perfect triangles; they are quadrilaterals. Why is that significant? Look at the "diagonal line" on each of the diagrams. You may be able to see, if you look closely, that the supposed diagonal line is not really a straight line. Rather, it's two connected segments (two straight line segments) with a slight angle to it where the two segments meet.\n\nThe top diagram bends in a convex manner, so that there is slightly more area contained below the diagonal. In the bottom diagram, the bend is in the opposite direction.\n\nTo help you see this better, look at the green traingle in the top diagram. It's dimensions are 2 units high, and 5 units long. The Red triangle is 3 units high. In order for the two line segments that make up the combined diagonal to be a straight line, the Red triangle would therefore need to be 7.5 units long (2/5 = 3/x; therefore x=7.5). Instead, it's 8 units long. If that Red Triangle were only a half a unit shorter along the base, then the diagram would all line up, and we wouldn't be trying to solve this problem!\n\nThe four pieces that make up the upper diagram "appear to fit exactly" on a triangle that is half of a rectangle 13 units long and 5 units high. (Count the squares: 13 across, 5 down.) If "appearances are correct", then that would imply that the total area of the four pieces is half of 13x5, or half of 65. So you would think that the total area of these four pieces is 32.5 square units. Let's total them up and see:\n\nIn the top diagram, you can see that the two irregular pieces combine to make a 3x5 rectangle. So these two pieces are 15 square units (you can count the squares, as well! One is 7 squares, the other is 8.) That's part of our total.\n\nThe Red Triangle is half of a 3x8 rectangle. So it's 12 square units. So add 12 to our total.\n\nThe Green Triangle is half of a 2x5 rectangle. So it's 5 square units. So add 5 to our total.\n\nTotal Area of the four pieces is 15+12+5 square units, or 32 square units. So the top quadrilateral is covering only 32 squares out of the 32.5 square units that a triangle would cover. It LOOKS LIKE it covers 32.5 squares, but really it only covers 32!\n\nLet's check the bottom diagram. Obviously the four pieces only cover 32 square units, using the same math as above. There's a 33rd square which is empty.\n\nIf you take the top diagram, and rotate it 180 degrees, so that it fits perfectly on the bottom diagram, you'll see that the red triangles are butted against each other, as well as the green traingles. Therefore, if the top diagram has a slight angle caused by the line segments, the bottom diagram has a slight angle exactly complimentary to the top one. Therefore, if the top diagram undershoots the 32.5 square units by just a half of a square, then the bottom one OVERshoots it by half a square.\n\nAdd up the two half squares, and you have the whole hole.\n\nFour pieces that cover 32 squares, plus four pieces that cover 32 squares, plus one empty square equals 65 squares, which is the area of rectangle 13 units long and 5 units high.\n\n(7+8+12+5) + (7+8+12+5) + 1 = 13 x 5\n\nClear as mud, eh?
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go on\nwww.hotmath.com
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Try:\n\nhttp://www.sosmath.com/cyberexam/algebra/q001/1/1.html\n\nhttp://www.math.com/practice/Algebra.html\n\nhttp://www.glencoe.com/sec/math/studytools/prealglblr.shtml \n\nhttp://www.syvum.com/squizzes/algebra/
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Look for a mathematic answer book
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http://www.math.com/  It has almost everything about math on it, including algebra.
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Mathematics- The science of numbers in all their relations and applications. (Math is a general concept including arithmetic, statistics and probability, trig., calculus, and more)\n\nArithmetic- The most elementary branch of mathematics (addition, subtraction, multiplication, division for example)
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here's a couple:\n\nhttp://www.tc.cornell.edu/Services/Education/Gateways\nhttp://mathforum.org/library/view/4315.html\nhttp://mathworld.wolfram.com/letters/\nhttp://www.heymath.net/index.jsp\nhttp://www.sosmath.com/index.html\nhttp://planetmath.org/\nhttp://score.kings.k12.ca.us/
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Check out this web page: http://mathworld.wolfram.com/Net.html
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The official site only lists back to 1996, so you might try posting a message here\nhttp://www.mathlinks.ro/Forum/forum-314-50-50.html\nor, email mathcamp and ask them mc-info@mathcamp.org
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Please state the requirements of the mathematic's work project.\n\n- - - - - - - -s-
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http://www.algebra.com
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u cud either go to wikipedia.com else u can try mathworld.wolfram.com u'l gt al math related info here
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Go to this site.\n\nhttp://en.wikiquote.org/wiki/Mathematics
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The Edifier has it right, but darned if I can follow the notation. You really need to see this written out like a textbook to understand what's going on.\n\nClick the link below in "sources" to see the answer hosted at my website www.calculus-help.com. Right now, Yahoo! answers, as far as I can tell, doesn't allow graphics, which makes it tricky to answer ANY math questions.\n\nPlease don't post math answers, guys, if the poster knows the answer but can't get there, and you get something completely different.
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http://www.math.com/ or http://www.gomath.com/algebra.html are good places to start.
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The order of mathmatical operations can be abbreviated as BEDMAS\n\nBrackets\nExponents\nDivision\nMultiplication\nAddition\nSubtraction\n\nYour question can be written SQRT (144 x 12 - 4)\n\nDo the brackets first, again following BEDMAS\n=1724\nThen the SQRT which is essentially an exponent.\n=41.52....\n\nIt's so nice to see so many eager to answer the question wrong.
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http://purplemath.com/modules/index.htm\n\nis an awesome resource for all kinds of algebra topics, even ones you may have forgotten and need to brush up on.\n\nTake a look at that one.\nUMRmathmajor