\input{preamble-standalone.ltx} \begin{document} % Ex. No. 188 (Section 22.4.1 : Determination of the three angles of a triangle) \begin{tikzpicture}[scale=1.25,rotate=30] \tkzDefPoints{0.5/1.5/A, 3.5/4/B, 6/2.5/C} \tkzDrawPolygon(A,B,C) \tkzDrawPoints(A,B,C) \tkzLabelPoints[below](A,C) \tkzLabelPoints[above](B) \tkzMarkAngle[size=1cm](B,C,A) \tkzFindAngle(B,C,A) \tkzGetAngle{angleBCA} \edef\angleBCA{\fpeval{round(\angleBCA,2)}} \tkzLabelAngle[pos = 1](B,C,A){$\angleBCA^{\circ}$} \tkzMarkAngle[size=1cm](C,A,B) \tkzFindAngle(C,A,B) \tkzGetAngle{angleBAC} \edef\angleBAC{\fpeval{round(\angleBAC,2)}} \tkzLabelAngle[pos = 1.8](C,A,B){% $\angleBAC^{\circ}$} \tkzMarkAngle[size=1cm](A,B,C) \tkzFindAngle(A,B,C) \tkzGetAngle{angleABC} \edef\angleABC{\fpeval{round(\angleABC,2)}} \tkzLabelAngle[pos = 1](A,B,C){$\angleABC^{\circ}$} \end{tikzpicture} \end{document}