Find the equation of circle with chord length m and N on X and Y axis

There should be four such circles~
Radius of circle = under root ((M / 2) ^ 2 + (n / 2) ^ 2)
The positions of the center of the circle are (M / 2, N / 2), (- M / 2, N / 2), (M / 2, - N / 2), (- M / 2, - N / 2)
The equation of the circle? You can write it yourself~
It's very clear to draw a picture of the geometry topic~

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