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I want to create picture on the following link.

How can I create this picture using LaTeX? I have tried different things but nothing works.

enter image description here

Reference: p.510 of http://www.pearsonschoolsandfecolleges.co.uk/Secondary/Mathematics/14-16/EdexcelGCSEMathematics/Samples/StudentBooksamples/SamplepagesfromLinearHigherStudentBook.pdf

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Welcome to TeX.sx! In its current form, your question might not receive many answers. This is a question-answer site and not intended for "do it for me" questions. Please provide some code that others can help you improve. –  Peter Jansson Feb 24 '13 at 15:16
    
I have tried different things which are mentioned on this site, but they are very different from what I want to do, therefore right now, I dont have a code. –  user26421 Feb 24 '13 at 15:24
3  
Look at the tikz manual. At least one diagram from your file is almost identical to one of the tutorials. –  mbork Feb 24 '13 at 15:26
1  
Note: this is very different from the normal use of "callouts"; in the linked image, it looks as if the formula in the first line was actually spoken by the formulae in the second line, which doesn't make sense. I'd change callouts into something different, like maybe rectangles with rounded corners with arrows or plain lines attached. This is not necessarily easier to do with tikz, but imho would be much better as far as communication with the reader goes. –  mbork Feb 24 '13 at 17:54
4  
Of the three hours this question has been open, the first hour was spent in simply getting you to specify which picture you were trying to recreate. During the second hour, I posted a screenshot of your desired result for you, in an attempt to prompt more experienced people to work something out. This is not a site where you can post a "tell me how to do this entire thing" without showing at least a minimal amount of effort in making a question specific enough to be answered, and/or showing what progress you've already attempted. –  Mike Renfro Feb 24 '13 at 18:40
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1 Answer

up vote 4 down vote accepted

Here a small code which can be used as a start.

\documentclass[]{standalone}

\usepackage{tikz}
\usetikzlibrary{calc,shapes.callouts,matrix}


\begin{document}

\begin{tikzpicture}
\matrix (m) [matrix of nodes,nodes={minimum width=6cm,text width=5.8cm}]
  {
    \rlap{Area of triangle $ABC=\frac12ab\sin C=\frac12bc\sin A=\frac12ca\sin B$} \\[1cm]
  \everymath{\color{red}}  $\frac12ab\sin C=\frac12bc\sin A$ &
  \everymath{\color{green}}  $\frac12bc\sin A=\frac12ca\sin B$ \\
  \everymath{\color{red}} cancelling $\frac12$ and $b$ from both sides &   
  \everymath{\color{green}} cancelling $\frac12$ and $c$ from both sides  \\
  };
\node[ellipse callout, draw=red, callout relative pointer={(-0.4,-0.4)},minimum width=4.6cm,minimum height=2cm] at ($(m-1-1)+(1.9,0)$) {};
\end{tikzpicture}
\end{document}

enter image description here

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Thanks alot your code really helped me. –  user26421 Feb 24 '13 at 19:05
    
@user26421: It's only a start which can be improved. –  Marco Daniel Feb 24 '13 at 19:10
    
Yes I know, and I have completed it. Thanks once again. –  user26421 Feb 24 '13 at 20:44
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