### Home > CCA2 > Chapter 8 > Lesson 8.1.2 > Problem 8-42

8-42.

A circle with its center on the line in the

^{st}quadrant is tangent to the

*-axis. .*

If the radius is

, what is the equation of the circle? What point on the line

isunits from the -axis?Use the coordinates of the center and the radius to write an equation in general form.

If the radius is

, what is the equation of the circle? See part (a).

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