23. Suppose a point (x, y) on the coordinate plane is rotated 270°
counterclockwise about the origin, then
reflected across the line
y=
-x, then reflected
across the y-axis.
Show that the image of (x, y) after this sequence of
transformations is the same as the image of
(x, y) after a 180° rotation about the origin.

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.