\r\n" );
document.write( "Suppose the angle drawn below has the measure of acute angle B in the isosceles\r\n" );
document.write( "triangle that you're going to construct with straight edge and compass, and,\r\n" );
document.write( "suppose the line segment drawn below the angle has the measure of the base of\r\n" );
document.write( "that isosceles triangle. \r\n" );
document.write( "
\r\n" );
document.write( "Bisect the angle, and construct the base of the triangle AC\r\n" );
document.write( "
\r\n" );
document.write( "Construct the perpendicular bisector of AC.\r\n" );
document.write( "Construct a line perpendicular to AC at A:\r\n" );
document.write( "
\r\n" );
document.write( "Construct one half the given vertex angle with vertex at A,\r\n" );
document.write( "and with the green line perpendicular to AC as its left side.\r\n" );
document.write( "
\r\n" );
document.write( "Extend the right side of the angle just constructed until it\r\n" );
document.write( "intersects the perpendicular bisector of the base AC. This\r\n" );
document.write( "will be point B.\r\n" );
document.write( "
\r\n" );
document.write( "Draw in the third side of the triangle BC. We know the construction\r\n" );
document.write( "is correct because the three angles indicated by the red double arcs \r\n" );
document.write( "have equal measure:\r\n" );
document.write( "
\r\n" );
document.write( " \r\n" );
document.write( "Edwin
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document.write( " \n" );
document.write( "![\"\"](\"/images/stars/stars-13.gif\")
