document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=966918>Question 966918</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a land 4 sides are 30,30,30,19.5 feets thn it's area is? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #590940 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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/cgi-bin/show-face.mpl?user=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=590940\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> my best guess is the land is in the shape of a trapezoid.<BR>\n" );
document.write( "the formula for the area of a trapezoid is 1/2 * (b1 + b2) * h.<BR>\n" );
document.write( "b1 and b2 are the parallel bases.<BR>\n" );
document.write( "h is the height.\r<BR>\n" );
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document.write( "do the bases have to be parallel to each other?<BR>\n" );
document.write( "it doesn't state.\r<BR>\n" );
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document.write( "if the bases are parallel to each other, then the formula above will calculate the area.<BR>\n" );
document.write( "if they are not, then i'm not sure how you would calculate the area except by using calculus or trigonometry or something like that since i don't believe there's a formula to calculate the area of an irregular shape that has the length of sides that you mention.\r<BR>\n" );
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document.write( "more information is needed.<BR>\n" );
document.write( "are two of the sides parallel to each other?\r<BR>\n" );
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document.write( "if so, which sides are parallel to each other (could be two 30 foot sides or could be one 30 and one 19.5 side)?\r<BR>\n" );
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document.write( "if not, then more information is needed such as the angles at the corners of the piece of land.\r<BR>\n" );
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document.write( "assuming the land is in the shape of a trapezoid and assuming that the sides that are opposite to each other are the 30 foot and the 19.5 foot side, then the formula would be:\r<BR>\n" );
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document.write( "area = 1/2 * (19.5 + 30) * h\r<BR>\n" );
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document.write( "you would need to find h.<BR>\n" );
document.write( "the trapezoid would have to be an isosceles trapezoid.<BR>\n" );
document.write( "the height would be equal to 29.5370 feet.<BR>\n" );
document.write( "the area would be eual to 731.04075 square feet.<BR>\n" );
document.write( "round that to 2 decimal places and the area is 731.04 square feet.\r<BR>\n" );
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document.write( "the worksheet i used is shown below:\r<BR>\n" );
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document.write( "to find h, you need to drop perpendiculars from A and B to E and F.<BR>\n" );
document.write( "this created right triangles.<BR>\n" );
document.write( "you then used the left right triangle to find the value of h through the use of trigonometry.<BR>\n" );
document.write( "the rest of the worksheet should be self explanatory.\r<BR>\n" );
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