document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1127226>Question 1127226</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In &#9651;ABC, m&#8736;CAB = 60° and point D&#8712;BC so that AD=10 in and the distance from D to AB is 5 in. Prove that AD is the angle bisector of &#8736;A. </SPAN>\n" );
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document.write( "If AD is 10 and the distance from D to AB is 5, then triangle ABD is a 30-60-90 right triangle, with the 30-degree angle at A.<br><BR>\n" );
document.write( "(My sketch has AB horizontal, with B to the right of A; AD slanting up to the right from A; DB perpendicular to AB.)<br><BR>\n" );
document.write( "Since angle A is 60 degrees, AD bisects it. </SPAN>\n" );
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