document.write( "Question 346239: if the sum of the base and the height of a triangle is 16 cm, what are the dimensions for which the area is a maximum?
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Algebra.Com's Answer #247583 by Fombitz(32388)\"\" \"About 
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1.\"b%2Bh=16\"
\n" ); document.write( "2.\"A=%281%2F2%29bh\"
\n" ); document.write( "From eq. 1,
\n" ); document.write( "\"b=16-h\"
\n" ); document.write( "Substitute into eq. 2,
\n" ); document.write( "\"A=%281%2F2%29%2816-h%29h\"
\n" ); document.write( "\"A=%281%2F2%29%2816h-h%5E2%29\"
\n" ); document.write( "\"A=-%281%2F2%29h%5E2%2B8h\"
\n" ); document.write( "Convert to vertex form to find the maximum of A, \"A=a%28x-h%29%5E2%2Bk\" where (\"h\",\"k\") is the vertex.
\n" ); document.write( "\"A=-%281%2F2%29h%5E2%2B8h\"
\n" ); document.write( "\"A=-%281%2F2%29%28h%5E2-16h%29\"
\n" ); document.write( "\"A=-%281%2F2%29%28h%5E2-16h%2B64%29%2B64%2F2\"
\n" ); document.write( "\"A=-%281%2F2%29%28h-8%29%5E2%2B32\"
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\n" ); document.write( "The vertex is (\"8\",\"32\").
\n" ); document.write( "The coefficient of the \"h%5E2\" term is negative so the value at the vertex is a maximum.
\n" ); document.write( "\"Amax=32\"cm^2
\n" ); document.write( "\"highlight%28h=8%29\"cm
\n" ); document.write( "From eq. 1,
\n" ); document.write( "\"b%2B8=16\"
\n" ); document.write( "\"highlight%28b=8%29\"cm
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