John was asked to design a three-sided flower garden with the following lengths: 5 feet, 11 feet, and 12 feet. How many feet of bricks will he need to enclose the garden?

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.

3

step-by-step explanation:

because where the point where the 2 lines intersect is (3,-1) the x value is 3