Question

What are the coordinates of D’ when the quadrilateral is reflected across the line y = x?
On a coordinate plane, quadrilateral A B C D has points (1, 2), (2, 4), (4, 3), (3, 1).
(1, 3)
(2, 4)
(3, 4)
(1, 1)

Answer 1

Reflecting across the line y = x swaps x and y. D is (3, 1), so D' = (1, 3).