\begin{tikzpicture}[scale=.8]
              \tkzDefPoint(0,0){o}
              \tkzDefPoint(2,0){a}
              \tkzDefPoint(30:4){za}
              \tkzDefPoint(210:1){z}
              \tkzDefPoint(100:3){w}
              \tkzDefPoint(280:4/3){wa}
              \tkzDefPoint(0:3){p}
              \tkzDefPoint(180:4){q}
              \tkzCircumCenter(z,za,p)\tkzGetPoint{cz}
              \tkzCircumCenter(w,wa,q)\tkzGetPoint{cw}
              \tkzDrawCircle[thin](o,a)
              \tkzDrawCircle[thin](cz,z)
              \tkzDrawCircle[thin](cw,w)
              \draw[<->] (-4.3,0)--(4.3,0);
              \draw[<->] (0,-3)--(0,4.3);
              \tkzDrawPoints(o,z,za,w,wa,a)
              \tkzLabelPoint[right](z){\(z\)}
              \tkzLabelPoint[right](za){\(z_a\)}
              \tkzLabelPoint[above](w){\(w\)}
              \tkzLabelPoint[right](wa){\(w_a\)}
              \tkzLabelPoint(a){\(1\)}
              \tkzLabelPoint(o){\(0\)}
              \end{tikzpicture}