Q:

Creating a triangle with text on the sides

I am creating a puzzle with triangle pieces, like the picture below. The idea is to have a bunch of equilateral triangles, with different math questions/answers written on the sides of the triangle. I have no idea where to even start, so any information is helpful.
While this image shows it pieced together, it should be a document with a bunch of separate triangles that they will have to cut out and piece together in the correct positions.

A:

This draws something of that sort. You probably need to change the formulae. If you want to rescale them to have all the same width, you can do that with adjustbox, but I personally do not like to use different font sizes.
\documentclass[tikz,border=3mm]{standalone}
\begin{document}
\begin{tikzpicture}[declare function={pft(\x)=0-isodd(\x)*pow(-1,int((\x-1)/2))*120;}]
 \def\mylst{"y=x^2","y=2x+4","y=\frac{\mathrm{d}y}{\mathrm{d}x}",%
    "y=x+2z","y=5x-19x^2","a^2+b^2=c^2","E=mc^2","E=a^2+b^2","h=x+y-z^2",%
    "s=t+u","r=u\cdot v"}
 \draw[very thick] (0,0) foreach \X in {1,...,11} 
 {\pgfextra{\pgfmathsetmacro{\mylab}{{\mylst}[\X-1]}} 
 -- node[auto,sloped]{$\mylab$} ++ ({pft(\X)}:5)};
\end{tikzpicture}
\end{document}

