I NEED HELP ASAP if you can just answer at least one of them that would be great but if you answer both I will literally make u the brainiest thing or whatever

Step-by-step explanation:

1. i think is b

2. 2 i think

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.