### Home > GB8I > Chapter 3 Unit 4 > Lesson INT1: 3.2.2 > Problem3-94

3-94.

Plot $\Delta ABC$ on graph paper with vertices $A(8, –4), B(8, 1),$ and $C(2, 0)$.

1. What is the area of $\Delta ABC$?

2. $\Delta ABC$ is rotated about the origin $180º$ to become $\Delta A^\prime B^\prime C^\prime$. Name the coordinates of $A^\prime, B^\prime,$ and $C^\prime$.

3. This time $\Delta ABC$ is rotated $180º$ about point $C$ to form $\Delta A^{\prime \prime} B^{\prime \prime} C^{\prime \prime}$. Name the coordinates of $B^{\prime \prime}$.

4. If $\Delta ABC$ is rotated $90º$ clockwise $(\circlearrowright)$ about the origin to form $\Delta A^{\prime \prime \prime}B^{\prime \prime \prime}C^{\prime \prime \prime},$ what are the coordinates of point $A^{\prime \prime \prime}$?

Use the eTool below to solve each part of the problem.
Click the link at right for the full version of the eTool: Int1 3-94 HW eTool.