document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=84731>Question 84731</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0395977274/algebrahomeworkh>Geometry</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Please explain to me how to do this kind of proof:\r<BR>\n" );
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document.write( "Two spheres have radii a and b. Prove that the ratio of the areas is a^2 : b^2 </SPAN>\n" );
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document.write( "Surface Area of a sphere = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2Api%2Ar%5E2 ALIGN=MIDDLE  ALT=\"4%2Api%2Ar%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So, Area of a sphere of radius a = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2Api%2Aa%5E2 ALIGN=MIDDLE  ALT=\"4%2Api%2Aa%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "    Area of a sphere of radius b = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2Api%2Ab%5E2 ALIGN=MIDDLE  ALT=\"4%2Api%2Ab%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Ratio of the areas = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284%2Api%2Aa%5E2%29%2F%284%2Api%2Ab%5E2%29 ALIGN=MIDDLE  ALT=\"%284%2Api%2Aa%5E2%29%2F%284%2Api%2Ab%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5E2%2Fb%5E2 ALIGN=MIDDLE  ALT=\"a%5E2%2Fb%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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