An angle has a measure of 61 degrees plus 1.1 radians. Determine the percentage of a circle's circumference cut off by this angle.  %   
Determine the measure of this angle in radians.  radians    
Determine the measure of this angle in degrees.  degrees   
Determine the value of s, the arc length (measured in inches) cut off by this angle when centered in a circle with a radius of 2.8 inches.  inches​

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thats not a system of equations, that is a solution

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.