Help please?

Triangle ABC is reflected across the line y = x. What are the coordinates of the vertex B' of the resulting triangle A'B'C'?

2, -5)
(-2, 5)
(5, -2)
(-5, -2)

Question

Help please? 


Triangle ABC is reflected across the line y = x. What are the coordinates of the vertex B' of the resulting triangle A'B'C'?

2, -5)
(-2, 5)
(5, -2)
(-5, -2)

anonymous · Answer

attachment

anonymous · Answer

Would it be (5,-2) ?

alekos · Answer

no. just get a ruler and measure it up

sirm3d · Answer

when a point \P((a,b)\) is reflected across the line $y=x$,  the coordinate of its reflection is $(b,a)$; that is, you swap the $x$- and $y$-coordinates of the point.