document.write( "Question 451004: Please tell me where we went wrong. The answer does not check out when you put it back into the equation. I know what the right answer is from trial and error, but I can't get the equation to get the right answer for me. WHAT AM I DOING WRONG? HELP! \r
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document.write( "The problem is: what is the height of a triangle if the base= 1/2h and the area = 196 mmsquared?
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document.write( "height = h
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document.write( "base = 1/2 h
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document.write( "A= 196 mm squared
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document.write( "so
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document.write( " A=1/2bh
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document.write( " A=1/2(1/2h)(h)
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document.write( " 196=1/2(1/2h)(h) can't we multiply both sides by 2 to get...?
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document.write( " 392=(cancels)(cancels h)(2h) or
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document.write( " 392=2h*h
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document.write( " 392=2h squared (divide both sides by 2)
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document.write( " 196=h squared (take the square root of h and 196)
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document.write( " 14=h\r
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document.write( "So height = 14 and base= 1/2h=1/2(14)/7.
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document.write( "Check answer:
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document.write( "196 = 1/2 (7) (14)
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document.write( "196 = 1/2 * 98
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document.write( "196 does not = 49\r
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Algebra.Com's Answer #310154 by edjones(8007)![]() ![]() You can put this solution on YOUR website! b=.5h, A=196 mm^2 \n" ); document.write( ".5bh=A \n" ); document.write( ".5*.5h*h=196 \n" ); document.write( ".25h^2=196 \n" ); document.write( "h^2=784 \n" ); document.write( "h=28 mm \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( ". \n" ); document.write( "PS: \n" ); document.write( "196=1/2(1/2h)(h) can't we multiply both sides by 2 to get...? \n" ); document.write( "NO we can't! You can cancel off one 1/2 only when multiplying or dividing. Also (1/2h) is incorrect. (h/2) is correct and easiest. Also h(1/2) is correct. \n" ); document.write( ". \n" ); document.write( "I'm glad to help someone who shows their work like you have. \n" ); document.write( " |