document.write( "Question 374262: Express the length L of a chord of a circle with radius 10cm as a function of the central angle \n" ); document.write( "

Algebra.Com's Answer #266359 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "There are two methods.  The answers look different but are\r\n" );
document.write( "equivalent.  I'll do it both ways:\r\n" );
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document.write( "If you have studied the law of cosines then:\r\n" );
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document.write( "If you haven't studied the law of cosines, it can be done another way,\r\n" );
document.write( "but it involves the angle  instead of .\r\n" );
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document.write( "For doing it that way, draw in this green median, which, since the triangle\r\n" );
document.write( "is isoceles, is the bisector of the central angle as well as the \r\n" );
document.write( "perpendicular bisector of the chord, forming two congruent right triangles.\r\n" );
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document.write( "Looking at the upper right triangle only, we see that\r\n" );
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document.write( "Multiply both sides by 10\r\n" );
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document.write( "Multiply both sides by 2\r\n" );
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document.write( "Edwin

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