Geometry: Write the coordinates of the vertices after a reflection across the line y = –x.

Question

Write the coordinates of the vertices after a reflection across the line y = ^–x.

C(-5,-10) D(-5,-3) E(2,-3) F(2,-10)

Answer 1

Use the rule for a point (x,y) reflected over the line y= -x would be (-y, -x)

C (-5,-10) would be (10,5)

D (-5,-3) would be (3,5)

E (2,-3) would be (3,-2)

F (2,-10) would be (10,-2)