Question

each large tick mark on the ruler represents 1 centimeter. what is the length of $overline{ad}$?

Explanation:

Step1: Locate points A and D on the ruler

Point A is at 0 cm and point D is at 3 cm.

Step2: Calculate the length

Length of $\overline{AD}$ is the difference of the positions of D and A. So, $3 - 0=3$ cm.

Answer:

3 cm