How can I standardize my square root signs?

Question

I've noticed that when square root signs get too large, their front leg goes vertical (1), and that otherwise, it angles to the right (2).

How can I standardize all my square root signs to either behavior?

\documentclass{article}
\usepackage{amsmath}
\begin{document}

\begin{align}
\Delta F_0 &= \sqrt{\sum_{i=1}^n\left(\frac{\delta F_0}{\delta x_i}\Delta x_i\right)^2}\\[0.2cm]
\Delta F_0 &= \sqrt{6.044 \cdot  10^{-6}\text{m}^2}
\end{align}

\end{document}

Answer 1

In general, you can't standardise this: the over-large ones have to be straight as TeX can not stretch otherwise, for smaller sizes it depends on the font in use, the shape, and how many designed sizes there are is controlled by the font not TeX.

Almost all fonts will use a slanted design for the designed glyphs before TeX falls back to the straight extender, so one way to standardise on sloping design unless you have really tall entries is to use a font that has more sizes of designed sqrt size than the original cm fonts. The yhmath font is one such font:

\documentclass{article}
\usepackage{amsmath,yhmath}
\begin{document}

(1)
\[\Delta F_0 = \sqrt{\sum_{i=1}^n\left(\frac{\delta F_0}{\delta x_i}\Delta x_i\right)^2}\]


(2)
\[\Delta F_0 = \sqrt{6.044 \cdot 10^{-6}\text{m}^2}\]

\end{document}