Circle

Circle touch two parallel lines p and q; and its center lies on a line a, which is secant of lines p and q.

Write the equation of circle and determine the coordinates of the center and radius.

p: x-10 = 0
q: -x-19 = 0
a: 9x-4y+5 = 0

Result

xS =  -4.5
yS =  -8.88
r =  NAN

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Many examples required To solve this verbal math problem are needed these knowledge from mathematics:

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