tikz.dev / tkz-euclide Manual

tkz-euclide

Complements

38 Using the compass

38.1 Main macro \tkzCompass

  • \tkzCompass[⟨local options⟩](⟨A,B⟩)

    • This macro leaves a compass mark, i.e. an arc through a given point; the center must be given. Several specific options change the appearance of the arc, as well as TikZ options such as style, color, line width, etc.

    You can set the length of the arc with the option length or the option delta.

    optionsdefaultdefinition
    delta0 (deg)Increases the angle of the arc symmetrically
    length1 (cm)Changes the length (in cm)
38.1.1 Option length

Compiled output

\begin{tikzpicture}
\tkzDefPoint(1,1){A}
\tkzDefPoint(6,1){B}
\tkzInterCC[R](A,4)(B,3)
\tkzGetPoints{C}{D}
\tkzDrawPoint(C)
\tkzCompass[length=1.5](A,C)
\tkzCompass(B,C)
\tkzDrawSegments(A,B A,C B,C)
\end{tikzpicture}
38.1.2 Option delta

delta is an angle in degrees: the mark goes from \(-\delta\) to \(+\delta\) around the point. Decimal values are accepted. With the default value \(0\), the length of the mark is given by the option length.

Compiled output

\begin{tikzpicture}
\tkzDefPoint(0,0){A}
\tkzDefPoint(5,0){B}
\tkzInterCC[R](A,4)(B,3)
\tkzGetPoints{C}{D}
\tkzDrawPoints(A,B,C)
\tkzCompass[delta=20](A,C)
\tkzCompass[delta=20](B,C)
\tkzDrawPolygon(A,B,C)
\tkzMarkAngle(A,C,B)
\end{tikzpicture}
38.2 Multiple constructions \tkzCompasss

  • \tkzCompasss[⟨local options⟩](⟨pt1,pt2 pt3,pt4,…⟩)


    • ☞ 💣 Note that the arguments are lists of pairs of points. This saves a few lines of code.

    optionsdefaultdefinition
    delta0Modifies the angle of the arc by increasing it symmetrically
    length1Changes the length
38.2.1 Use of \tkzCompasss

Compiled output

\begin{tikzpicture}[scale=.6]
\tkzDefPoint(2,2){A} \tkzDefPoint(5,-2){B}
\tkzDefPoint(3,4){C} \tkzDrawPoints(A,B)
\tkzDrawPoint[shape=cross out](C)
\tkzCompasss[new](A,B A,C B,C C,B)
\tkzShowLine[mediator,new,dashed,length = 2](A,B)
\tkzShowLine[parallel = through C,
color=purple,length=2](A,B)
\tkzDefLine[mediator](A,B)
\tkzGetPoints{i}{j}
\tkzDefLine[parallel=through C](A,B)
\tkzGetPoint{D}
\tkzDrawLines[add=.6 and .6](C,D A,C B,D)
\tkzDrawLines(i,j) \tkzDrawPoints(A,B,C,i,j,D)
\tkzLabelPoints(A,B,C,i,j,D)
\end{tikzpicture}