document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1146371>Question 1146371</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The equilateral triangle ACD is rotated contrary clockwise around point A. What is the angle of rotation when triangle ACD covers triangle ABC the first time?  A) 60 ° B) 120 ° C) 180 ° D) 240 ° E) 300\r<BR>\n" );
document.write( "\n" );
document.write( "I don't know how to insert the picture so I'll describe it its a rhombus and it is cut diagonally from point A to C. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #767770 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13334)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=767770\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "ABCD is a rhombus; and triangle ACD is equilateral.  That makes triangle ABC also equilateral.<br><BR>\n" );
document.write( "So angles DAC and CAB are each 60 degrees.<br><BR>\n" );
document.write( "Therefore, when triangle ACD is rotated counterclockwise about point A, it will exactly cover triangle ABC after rotating 60 degrees.<br><BR>\n" );
document.write( "ANSWER A </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );