added thaleskreis

tikz/thales-circle-triangle/Makefile

@@ -0,0 +1,31 @@
+SOURCE = thales-circle-triangle
+DELAY = 80
+DENSITY = 300
+WIDTH = 500
+
+make:
+	pdflatex $(SOURCE).tex -output-format=pdf
+	make clean
+
+clean:
+	rm -rf  $(TARGET) *.class *.html *.log *.aux
+
+gif:
+	pdfcrop $(SOURCE).pdf
+	convert -verbose -delay $(DELAY) -loop 0 -density $(DENSITY) $(SOURCE)-crop.pdf $(SOURCE).gif
+	make clean
+
+png:
+	make
+	make svg
+	inkscape $(SOURCE).svg -w $(WIDTH) --export-png=$(SOURCE).png
+
+transparentGif:
+	convert $(SOURCE).pdf -transparent white result.gif
+	make clean
+
+svg:
+	#inkscape $(SOURCE).pdf --export-plain-svg=$(SOURCE).svg
+	pdf2svg $(SOURCE).pdf $(SOURCE).svg
+	# Necessary, as pdf2svg does not always create valid svgs:
+	inkscape $(SOURCE).svg --export-plain-svg=$(SOURCE).svg

tikz/thales-circle-triangle/README.md

@@ -0,0 +1,3 @@
+Compiled example
+----------------
+![Example](thales-circle-triangle.png)

tikz/thales-circle-triangle/thales-circle-triangle.tex

@@ -0,0 +1,56 @@
+\documentclass{article}
+\usepackage[pdftex,active,tightpage]{preview}
+\setlength\PreviewBorder{2mm}
+\usepackage{tikz}
+\usepackage{tkz-euclide}
+\usetkzobj{all}
+\usetikzlibrary{shapes, calc, decorations} 
+\usepackage{amsmath,amssymb}
+\usepackage{helvet}
+\usepackage[eulergreek]{sansmath}
+
+\begin{document}
+\begin{preview}
+\begin{tikzpicture}[scale=1.5,font=\sansmath\sffamily]
+    \tkzDefPoint(0,0){A}
+    \tkzDefPoint(4,0){B}
+    \tkzDefPoint(2,0){M}
+    \tkzDefPoint(3,2){H}
+
+    \tkzInterLC[/tikz/overlay](M,H)(M,B) \tkzGetPoints{E}{C}
+
+    \tkzLabelPoints[above right](C)
+
+    \tkzMarkAngle[fill=blue!30,size=0.6cm,opacity=.5](C,B,A)
+    \tkzLabelAngle[pos=0.4](A,B,C){$\beta$}
+
+    \tkzMarkAngle[fill=blue!30,size=0.6cm,opacity=.5](M,C,B)
+    \tkzLabelAngle[pos=0.4](B,C,M){$\beta$}
+
+    \tkzMarkAngle[fill=blue!30,size=0.6cm,opacity=.5](B,M,C)
+    \tkzLabelAngle[pos=0.4](B,M,C){$\delta$}
+
+    \tkzMarkAngle[fill=blue!30,size=0.6cm,opacity=.5](M,A,C)
+    \tkzLabelAngle[pos=0.4](M,A,C){$\alpha$}
+
+    \tkzMarkAngle[fill=blue!30,size=0.6cm,opacity=.5](A,C,M)
+    \tkzLabelAngle[pos=0.4](A,C,M){$\alpha$}
+
+    \tkzMarkAngle[fill=blue!30,size=0.6cm,opacity=.5](C,M,A)
+    \tkzLabelAngle[pos=0.4](C,M,A){$\gamma$}
+
+    \tkzDrawSector[thick](M,B)(A)
+
+    \tkzLabelSegment[below=-1pt](A,M){$r$}
+    \tkzLabelSegment[below=-1pt](M,B){$r$}
+    \tkzLabelSegment[right=-1pt](M,C){$r$}
+
+    \tkzLabelPoints[below left](A)
+    \tkzLabelPoints[below right](B)
+    \tkzLabelPoints[below](M)
+
+    \tkzDrawSegments(A,B B,C C,A)
+    \tkzDrawSegments(M,B B,C C,M)
+\end{tikzpicture}
+\end{preview}
+\end{document}