Bonnie bought 6 packs of red bouncy balls, 6 packs of yellow bouncy balls, and 2 packs of green bouncy balls. there were 11 bouncy balls in each package. how many bouncy balls did bonnie buy in all?

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.