document.write( "Question 119087: side AB and BC and median AD of a triangle ABC respectively proportional to the sides PQ and QR and median of triangle PQR show that traingle ABC~PQR \n" ); document.write( "
Algebra.Com's Answer #87203 by MathLover1(20850)\"\" \"About 
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Remember:
\n" ); document.write( "to be \"congruent\" is not same as to be \"+similar\" \r
\n" ); document.write( "\n" ); document.write( "The \"median\" of a triangle is a \"line\" from a \"vertex\" to the \"midpoint\" of the opposite side.\r
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\n" ); document.write( "Given:\r
\n" ); document.write( "\n" ); document.write( "Triangles \"ABC+\"and \"PQR\"\r
\n" ); document.write( "\n" ); document.write( "\"AB\" proportional to \"PQ\"\r
\n" ); document.write( "\n" ); document.write( "\"BC\" proportional to \"QR\"
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\n" ); document.write( "and median \"AD\" proportional to \"PM\"\r
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\n" ); document.write( "\n" ); document.write( "to prove:\r
\n" ); document.write( "\n" ); document.write( "triangles\"ABC+\"and \"PQR\" are similar\r
\n" ); document.write( "\n" ); document.write( "\"ABC\"~\"PQR\"\r
\n" ); document.write( "\n" ); document.write( "proof:\r
\n" ); document.write( "\n" ); document.write( "prove that three sides of triangles are proportional\r
\n" ); document.write( "\n" ); document.write( "since \"M\" is midpoint of \"AC\", then \r
\n" ); document.write( "\n" ); document.write( "\"AD\" is proportional to \"PM\" and \"DC\" proportional to \"MR\"\r
\n" ); document.write( "\n" ); document.write( "since \"AD+%2B+DC+=+AC\" \r
\n" ); document.write( "\n" ); document.write( "and \"PM+%2B+MR+=+PR\" \r
\n" ); document.write( "\n" ); document.write( "we can conclude that \"AC\" is proportional to \"PR\"\r
\n" ); document.write( "\n" ); document.write( "two triangles \"ABC\" and \"PQR\" have three sides that are proportional\r
\n" ); document.write( "\n" ); document.write( "\"AB\" proportional to \"PQ\"\r
\n" ); document.write( "\n" ); document.write( "\"AC\" proportional to \"PR\"\r
\n" ); document.write( "\n" ); document.write( "and \"BC\" proportional to \"QR\"\r
\n" ); document.write( "\n" ); document.write( "therefore triangles\"ABC\" and \"PQR\" are \"similar+\", or \r
\n" ); document.write( "\n" ); document.write( "\"ABC\"~\"PQR\"\r
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