document.write( "Question 1107068: How many different rays can be named using three collinear points P,Q and R? 1 ,2,3 or 4? \n" ); document.write( "

Algebra.Com's Answer #722140 by ikleyn(52803) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "Two points (each pair of points) determines TWO rays with the opposite directions.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Depending on which of the two points is its BEGINNING point.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "So, we have ordered pairs of points.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Having three points, you may form  3*2  ordered pairs and hence, 6 different rays.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "The solution by other tutor is irrelevant.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );