On graph paper, plot $ABCD$ if $A(–1, 2)$, $B(0, 5)$, $C(2, 5)$, and $D(6, 2)$.  6-16 HW eTool  

1. If $ABCD$ is rotated $90º$ counterclockwise ($\circlearrowleft$) about the origin, name the coordinates of the image $A'B'C'D'$.

2. On your graph, reflect $ABCD$ across the $y$-axis to find $A''B''C''D''$. Name the coordinates of $A''$ and $C''$.

3. Calculate the area of $ABCD$. Hint: Divide the figure into rectangles and triangles.

   Hint (c):

   Area of a trapezoid $=\frac{1}{2}(b_{1}+b{_{2}})h$