2019 AMC 12B Question 3
AMC12 · 2019 AMC 12B
Which one of the following rigid transformations (isometries) maps the line segment $\overline{AB}$ onto the line segment $\overline{A'B'}$ so that the image of $A(-2,1)$ is $A'(2,-1)$ and the image of $B(-1,4)$ is $B'(1,-4)?$
reflection in the $y$-axis
counterclockwise rotation around the origin by
$90^\circ$
translation by $3$ units to the right and $5$ units
down
reflection in the $x$-axis
clockwise rotation about the origin by
$180^\circ$