document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=255370>Question 255370</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with my geometery proofs.  <BR>\n" );
document.write( "Given:  BF is parrallel to CD<BR>\n" );
document.write( "Prove:  AB/AC=BF/CD (ab over ac is equal to bf over cd)<BR>\n" );
document.write( "This is a 2 column proof.  <BR>\n" );
document.write( "Picture: One little triangle is inside of a bigger triangle.  Both triangles share the same vertex angle.<BR>\n" );
document.write( "Statements:<BR>\n" );
document.write( "1.  BF is parrallel to CD.<BR>\n" );
document.write( "2.  Angle 1 is congruent to Angle C, Angle 3 is congruent to Angle C.<BR>\n" );
document.write( "3.  Angle A is congruent to Angle A.<BR>\n" );
document.write( "4.  Triangle ABF is similar to Triangle ACD.<BR>\n" );
document.write( "5.  AB/AC=BF/CD\r<BR>\n" );
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document.write( "Reasons:<BR>\n" );
document.write( "1.  Givens<BR>\n" );
document.write( "2.  Corresponding angles are congruent.<BR>\n" );
document.write( "3.  Congruence of angles is reflexsive.<BR>\n" );
document.write( "4.  Angle Angle similarity<BR>\n" );
document.write( "5.  Def of similar Angles.\r<BR>\n" );
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document.write( "Thanks so much! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #187639 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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/cgi-bin/show-face.mpl?user=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=187639\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I would have mentioned parallel lines intersected by a transversal forms angles which are congruent.<BR>\n" );
document.write( "We have line AC intersecting BE and CD<BR>\n" );
document.write( "and line AD intersecting lines BE and CD<BR>\n" );
document.write( "Since (given) BE is parallel to CD, then angles ABE and ACD are congruent and angles AEB and ADC are congruent.<BR>\n" );
document.write( "triangles CAD and BAE share angle BAE all three angles are congruent .<BR>\n" );
document.write( "Since all three angles are congruent the triangles are similar.<BR>\n" );
document.write( "since the triangles are similar their corresponding sides are proportional<BR>\n" );
document.write( "therefore    blah blah QED\r<BR>\n" );
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document.write( "PS you didn't say where angle 1 and angle 3 are </SPAN>\n" );
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