\begin{tikzpicture} \tkzDefPoint(0,0){o} \tkzDefPoint(2,0){a} \tkzDefPoint(0:1.2){p} \tkzDefPoint(0:3.333){p*} \tkzDefPoint(85:2){u} \tkzDefPoint(40:2){v} \tkzCircumCenter(p,p*,u)\tkzGetPoint{cu} \tkzCircumCenter(p,p*,v)\tkzGetPoint{cv} \tkzDrawArc[color=black](cu,u)(p) \tkzDrawArc[color=black](cv,v)(p) \tkzDefLine[perpendicular=through u,K=.-1](o,u);\tkzGetPoint{lu}; \tkzDefLine[perpendicular=through v,K=.-1](o,v);\tkzGetPoint{lv}; \tkzInterLL(lu,u)(lv,v) \tkzGetPoint{cuv} \tkzDrawArc[color=black](cuv,u)(v) \tkzDrawCircle[dashed,color=blue](o,a) \tkzDrawPoints[fill=white](u,v) \tkzDrawPoint[fill=red](p) \tkzLabelPoints(p) \tkzLabelPoints[above](u) \tkzLabelPoints[right](v) \draw (p)++(100:.4) arc(100:145:.4cm) node[above]{\(\alpha\)}; \end{tikzpicture}