### Home > MC2 > Chapter 2 > Lesson 2.2.4 > Problem2-77

2-77.

Louis is dilating triangle $ABC$ below. He multiplied each $x$-coordinate and $y$-coordinate of triangle $ABC$ by $-2$. .

1. What are the new coordinates of the points?

Use the graph to find the coordinates of Points $A, B,$ and $C$. Then multiply each value by $-2$. For example, Point $A$ is originally $(-3,2)$. Its new coordinate will be $(6,-4)$. Find Points $B$ and $C$.

2. Graph Louis' new triangle.

After multiplying each $x$-coordinate and $y$-coordinate by $-2$, plot the new points.

3. Describe how triangle $ABC$ changed.

Its sides are twice as long and rotated $180$ degrees.

Use the eTool below to graph Louis' new triangle.
Click the link at right for the full version of the eTool: MC2 2-77 HW eTool