\title	{Simetría del plano II}
\language{en}
\author	{XIAO Gang}
\email	{xiao@unice.fr}
\format	{html}
\range  {-5..5}
\precision{10000}

\matrix{data=
1,0.0,-1, 2, reflection with respect to the line y=0
-1,0.0,1, 1, reflection with respect to the line x=0
-1,0.0,-1,4, central symmetry with respect to the origin
0,1.1,0,  5, reflection with respect to the line y=x
0,-1.-1,0,4, reflection with respect to the line x+y=0
0,1.-1,0, 7, clockwise rotation of 90 degrees
0,-1.1,0, 6, counter-clockwise rotation of 90 degrees
}
\integer{datacnt=rows(\data)}
\text{ch=shuffle(\datacnt)}
\text{ch=item(1..4,\ch)}
\text{good=item(1,\ch)}
\text{ch=shuffle(\ch)}
\integer{goodpos=positionof(\good,\ch)}
\text{A=item(1,\ch)}
\text{B=item(2,\ch)}
\text{C=item(3,\ch)}
\text{D=item(4,\ch)}
\text{aa=wims(translate . to ; in item(1..3,row(\A,\data)))}
\text{bb=wims(translate . to ; in item(1..3,row(\B,\data)))}
\text{cc=wims(translate . to ; in item(1..3,row(\C,\data)))}
\text{dd=wims(translate . to ; in item(1..3,row(\D,\data)))}
\text{goodrow=row(\good,\data)}
\text{goodtext=item(5,\goodrow)}
\text{good=item(\goodpos,A,B,C,D)}

\statement{Entre las siguientes matrices, cuál corresponde a la reflexión con respecto a la recta y=x del plano?
<p><center>
\(A=[\aa], B=[\bb], C=[\cc], D=[\dd])
</center>
}

\choice{La matriz correspondiente es}{\good}{A,B,C,D}
