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I work with the latex class beamer (\usetheme{Warsaw}). In order to say the area C of mathematics was born from the area A and the area B, I need to draw two circles (area A and area B) in right and left with two arrows comes from them into the third one (area C) that is under and between them. Is there any idea how to draw it?

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2 Answers 2

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Inspired by https://tex.stackexchange.com/a/283917/36296

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{arrows,positioning,trees} 

\tikzset{
    >=stealth',
    punkt/.style={
        circle,
        draw, 
        fill=blue!30,
        text centered},
    level 1/.style={sibling angle=120, level distance=1cm},
    edge from parent/.style= {draw=none},
}

\begin{document}
\begin{frame}
\begin{tikzpicture}

\coordinate (main) at (0,0) [clockwise from=270]
    child { node[punkt] (1) {A}}
    child { node[punkt] (2) {B}}
    child { node[punkt] (3) {C}}
;

\draw[->] (2) -- (1);
\draw[->] (3) -- (1);

\end{tikzpicture}
\end{frame}
\end{document}

enter image description here

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Another solution:

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{arrows,positioning}

\begin{document}
\begin{frame}
    \centering
\begin{tikzpicture}[
    node distance = 14.1 mm and 10 mm,
                > = stealth',
every node/.style = {circle, draw=blue!30!black, fill=blue!30,
                     minimum size=7mm}
                    ]
\node (b) {B};
\node (a) [below right=of b]    {A};
\node (c) [above right=of a]    {C};
%
\draw[->] (b) -- (a);
\draw[->] (c) -- (a);
\end{tikzpicture}
\end{frame}
\end{document}

enter image description here

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  • Nice choice of fill colour! :) Nov 2, 2016 at 18:13
  • to be honest, i copy it from your nice answer :-)
    – Zarko
    Nov 2, 2016 at 18:14
  • In return I copied the rest of my answer from another question. The colour was the only original thing I contributed :) Nov 2, 2016 at 18:15
  • @tarl, here is usual way to say "thank you" with vote answer and accept this one, which is the best solve your problem :-)
    – Zarko
    Nov 3, 2016 at 14:43

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