document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=620363>Question 620363</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the formula to get the area of a circle that has a 29mm diameter  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #390169 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=390169\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The formula for the area (A) of a circle is usually given as a function of the radius (r), and involves the irrational number pi (<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi ALIGN=MIDDLE  ALT=\"pi\"   DISABLED_style= \"max-width:90%; height:auto;\" >).<BR>\n" );
document.write( "The formula is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=pi%2Ar%5E2 ALIGN=MIDDLE  ALT=\"A=pi%2Ar%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Since the radius is half of the diameter (D), the formula using the diameter would be<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=pi%2A%28D%5E2%2F4%29 ALIGN=MIDDLE  ALT=\"A=pi%2A%28D%5E2%2F4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "With a diameter of 29 mm, The area of the circle, in square millimeters would be<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=pi%2A%2829%5E2%2F4%29=pi%2A%28841%2F4%29=pi%2A210.25 ALIGN=MIDDLE  ALT=\"A=pi%2A%2829%5E2%2F4%29=pi%2A%28841%2F4%29=pi%2A210.25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "If you are using a calculator that has pi as one of the keys, you can use a very close pi approximation, and get a more accurate result than just entering a pi approximation with a few decimal places, like 3.14, or 3.1416<BR>\n" );
document.write( "If you use 22/7 as your approximation for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi ALIGN=MIDDLE  ALT=\"pi\"   DISABLED_style= \"max-width:90%; height:auto;\" > ,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=%2822%2F7%29%2A%28841%2F4%29=%2811%2F7%29%2A%28841%2F2%29=9251%2F14=4625.5%2F7 ALIGN=MIDDLE  ALT=\"A=%2822%2F7%29%2A%28841%2F4%29=%2811%2F7%29%2A%28841%2F2%29=9251%2F14=4625.5%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" > which rounds to 661.<BR>\n" );
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