Aradius of a circle is perpendicular to a chord if and only if it
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a. is equal in length to that chord
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b. bisects that chord
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c. parallels that chord
d. intersects the chord directly on the circumference
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1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!