Turn line CD into a right triangle, with legs parallel to the x- and y-axes.
Use the Pythagorean Theorem to find the length of the line segment connecting the two points.
82 + 22 = c2
64 + 4 = c2
68 = c2
Complete the table in the eTool below to graph the points.
Click the link at right for the full version of the eTool: CC3 9-149 HW eTool