document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=309339>Question 309339</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given only the coordinates of the vertices of a triangle how would you verify that the triangle has congruent base angles?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #221237 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=221237\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given only the coordinates of the vertices of a triangle how would you verify that the triangle has congruent base angles? <BR>\n" );
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document.write( "Use the distance formula to find the length of the 3 sides: a,b,c<BR>\n" );
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document.write( "Use the Law of Cosines to find the measure of two angles.<BR>\n" );
document.write( "Cos(A) = [b^2 + c^2 - a^2]/[2bc]<BR>\n" );
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document.write( "Subtract their sum from 180 to find the meansure of the third angle.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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