Bayangan segitigan ABC dengan A(-1,4), B(2,5) dan C(-4,0) jiak direflesikan terhadap garis y=x adalah

Bayangan A
= [tex] \left[\begin{array}{ccc}0&1\\1&0\end{array}\right] \left[\begin{array}{ccc}-1\\4\end{array}\right] [/tex]
= [tex] \left[\begin{array}{ccc}0+4\\-1+0\end{array}\right] [/tex]
= [tex] \left[\begin{array}{ccc}4\\-1\end{array}\right] [/tex]

Bayangan B
= [tex] \left[\begin{array}{ccc}0&1\\1&0\end{array}\right] \left[\begin{array}{ccc}2\\5\end{array}\right] [/tex]
= [tex] \left[\begin{array}{ccc}0+5\\2+0\end{array}\right] [/tex]
= [tex] \left[\begin{array}{ccc}5\\2\end{array}\right] [/tex]

Bayangan C
= [tex] \left[\begin{array}{ccc}0&1\\1&0\end{array}\right] \left[\begin{array}{ccc}-4\\0\end{array}\right] [/tex]
= [tex] \left[\begin{array}{ccc}0\\-4+0\end{array}\right] [/tex]
= [tex] \left[\begin{array}{ccc}0\\-4\end{array}\right] [/tex]

Sehingga bayangannya adalah A'(4,-1), B'(5,2), dan C'(0,-4)