21. Quadrilateral ABCD is shown below. Quadrilateral QRST is the image of quadrilateral ABCD after the
transformation (x, y) - (-), x) is applied.
R
ti
2 -
Q
A LA and T
6
2
4
6 X
--2
BD and T
-4
CB and R
6
DC and Q
SELECT TWO of the angle pairs which have the same measure.