CPM Homework Help : INT1 Problem 3-81

Copy rectangle $ABCD$ at right on graph paper.

Rotate rectangle $ABCD \:90º$ counterclockwise $(\circlearrowleft )$ about the origin to create rectangle $A^\prime B^\prime C^\prime D^\prime$ . Name the coordinates of $C^\prime$ .
Reflect rectangle $ABCD$ across the vertical line $x = 1$ to create rectangle $A^{\prime \prime }B^{\prime \prime }C^{\prime \prime }D^{\prime \prime }$ . Name the coordinates of $C^{\prime \prime}$ .
Translate rectangle $ABCD$ so that $C$ is moved $5$ units down and $12$ units right. Name the coordinates of $C^{\prime \prime \prime }$ . How is this transformation related to the line $y=−\frac{5}{12}x+1$ ?
What is the area of rectangle $ABCD$ ?

Rectangle A,B,C,D in second quadrant with vertices as follows: Point A, (negative 5, comma 2). Point B, (negative 1, comma 2). Point C, (negative 1, comma 5). Point D, (negative 5, comma 5).

Use the eTool below to solve each part.
Click the link at right for the full version of the eTool: 3-81 HW eTool