HELP! I don't want an exact answer (u can if u want) but I would prefer directions to getting my total. 5 7/25 as a percent (this is for an end of the year review :)

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.

a is 8.b is 10.c is 10.5. d is -.5

step-by-step explanation:

just minus the smallest number from the biggest.

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.