How much longer is a 1-inch button than a 3/4-inch button

1/4

Step-by-step explanation: think od $1 you need four quarters to make one one full dollar. if you have three quarters you need one more to make a whole

Good luck

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.