Question

what is the length of $overline{cd}$?

Explanation:

Step1: Identify coordinates

The coordinate of point C is 380 and the coordinate of point D is 390.

Step2: Calculate length

The length of a line - segment with endpoints \(x_1\) and \(x_2\) is given by \(|x_2 - x_1|\). Here, \(x_1 = 380\) and \(x_2=390\), so the length of \(\overline{CD}=390 - 380\).

Answer:

10