keisha plans to run 4 miles this week .if she runs 2/3 of a mile each day ,how many days will it take her to run 4 miles will she be able to run 4 miles in a week

the answer is 13 cm

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.