document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=130678>Question 130678</A>: <I><SPAN STYLE=\"word-break: break-all;\"> HOW DID PEOPLE GET THE FORMULA A=1/2(B1+B2)H FROM A=BH </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #95426 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=95426\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> HOW DID PEOPLE GET THE FORMULA A=1/2(B1+B2)H FROM A=BH<BR>\n" );
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document.write( "They didn't.<BR>\n" );
document.write( "A=BH is the area of a parallogram.<BR>\n" );
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document.write( "A = (1/2)(B1 + B2)H is the area of a trapizoid.<BR>\n" );
document.write( "The formula comes from adding the area of the two <BR>\n" );
document.write( "triangles formed by the diagonal of a trapizoid.<BR>\n" );
document.write( "A = (1/2)B1*H + (1/2)B2*H<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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