document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=892696>Question 892696</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Write the equation of a circle with a center at (0, 0) and a radius of 5.\r<BR>\n" );
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document.write( "Write the equation of a circle with a center of (0, 0) and a diameter of 20.\r<BR>\n" );
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document.write( "Write the equation of a circle with a center at (1, 2) and a diameter of 15. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #540712 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=540712\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Standard equation for a circle centered at a point (h,k) is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28%28x-h%29%5E2%2B%28y-k%29%5E2=r%5E2%29 ALIGN=MIDDLE  ALT=\"highlight_green%28%28x-h%29%5E2%2B%28y-k%29%5E2=r%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Note that diameter <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d=2r ALIGN=MIDDLE  ALT=\"d=2r\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "The first circle centered at the origin is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x%5E2%2By%5E2=5%5E2%29 ALIGN=MIDDLE  ALT=\"highlight%28x%5E2%2By%5E2=5%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Your next two circles work this way.<BR>\n" );
document.write( "The diameter of 20 means that r=10, so this circle, centered at origin is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x%5E2%2By%5E2=100%29 ALIGN=MIDDLE  ALT=\"highlight%28x%5E2%2By%5E2=100%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "The last circle of diamter 15 has <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=7%261%2F2 ALIGN=MIDDLE  ALT=\"r=7%261%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and based on its given center,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28%28x-1%29%5E2%2B%28y-2%29%5E2=%2815%2F2%29%5E2%29 ALIGN=MIDDLE  ALT=\"highlight%28%28x-1%29%5E2%2B%28y-2%29%5E2=%2815%2F2%29%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "or<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28%28x-1%29%5E2%2B%28y-2%29%5E2=225%2F4%29 ALIGN=MIDDLE  ALT=\"highlight%28%28x-1%29%5E2%2B%28y-2%29%5E2=225%2F4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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