document.write( "Question 1083153: The base of an isosceles triangle is a=24cm side b=20cm find radius r and R (circumscribed and inscribed circle) \n" ); document.write( "

Algebra.Com's Answer #697231 by ikleyn(52786) $\"\"$ $\"About$

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document.write( "For the radius of the circumscribed circle use the formula \r\n" );
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document.write( "R = ,\r\n" );
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document.write( "where a, b and c are the sides measures and S is the area of the triangle.\r\n" );
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document.write( "(See the lesson  Proof of the formula for the radius of the circumscribed circle  in this site).\r\n" );
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document.write( "For the radius of the inscribed circle use the formula \r\n" );
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document.write( "r = ,\r\n" );
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document.write( "where a, b and c are the sides measures and p is the semi-perimeter of the triangle.\r\n" );
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document.write( "(See the lesson  Proof of the formula for the area of a triangle via the radius of the inscribed circle  and   in this site).\r\n" );
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document.write( "To find the area of the given triangle, find its altitude drawn to the base first:\r\n" );
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document.write( "h =  =  =  =  = 16 cm.\r\n" );
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document.write( "Then the area of the triangle is S =  =  = 192 cm^2.\r\n" );
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\n" ); document.write( "\n" ); document.write( "From this point, complete the solution on your own.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook on Geometry\r
\n" ); document.write( "\n" ); document.write( " GEOMETRY - YOUR ONLINE TEXTBOOK \r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part if this textbook under the topic \"Area of triangles\".\r
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