$\"\"$

Graph the coordinate plane and locate the points A and B. $\"\"$ lies on vertical gridline.

Since triangle ABD has right angle at B, $\"\"$ is perpendicular to $\"\"$ .

$\"Graph$

Find the length of $\"\"$ from the graph.

$\"\"$

Since $\"\"$ is the shorter leg, $\"\"$ is the longer leg. \ \ $\"\"$

Triangle ABD is a 30°- 60°- 90° triangle.

The 30°- 60°- 90° triangle has the property that the length of its longer leg is

$\"\"$ times to the length of the shorter leg.

$\"\"$

$\"\"$ (Substitute AB = 3)

$\"\"$ (Multiply)

The x-coordinate of the point D is $\"\"$ or 13.2.

The y-coordinate of the point D is as same as y-coordinate of the point B. $\"\"$

The coordinates of the point D are $\"\"$ or about $\"\"$ .