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How to start a sentence after using the superscript in latex

for eg. Ground plane is constructed with dimensions of 25\times10.5 mm^2 and the thickness of \ac{PEC} is 0.035 mm over the substrate. A triangular slot of height 4 mm is cut from the ground plane. Two sectors of radii 4 mm is also subtracted from the ground plane. This slotting is done in order to achieve the more optimized s-parameter value.

it is not coming in the way it is supposed to come.

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    Welcome to SX. Could you provide a minimal working example of your code so that we can see what exactly you are doing? – sheß Feb 25 at 18:05
  • Based on what you post I suspect that you are forgetting the math delimiters. But please provide a MWE – sheß Feb 25 at 18:06
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    Welcome to TeX.SX. When you post a question, please provide a "Minimal Working Example" (MWE) that starts with \documentclass, includes all relevant \usepackage commands, ends with \end{document} and compiles without errors, even if it does not produce your desired output. It is also helpful to explain in detail what your desired output is. – Sandy G Feb 25 at 18:15
  • Welcome to LaTeX SE. P.S., note that units should not be typeset in the same way as variables. See this question. – Karlo Feb 25 at 18:32
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I suspect you want your output to be:

enter image description here

You must enter "math mode" by enclosing your math content with $..$. Or, \(..\) will have the same effect. There are several ways to code the superscript for your units. The code

dimensions of $25\times10.5$\,mm\textsuperscript{2} and

will provide the output above. I recommend, however, that you consider the package siunitx for proper formatting of units. Information can be found here.

  • With this setup, a line break is possible between $25\times10.5$ and mm\textsuperscript{2} -- something that's frowned on, typographically speaking. Can you think of a way to prohibit such inopportune line breaks? – Mico Feb 25 at 20:15
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    It's more common to use \, (thinspace) rather than a full interword space (~) to join the number part and the associated units. – Mico Feb 25 at 21:28
  • Thanks for the tip @Mico. I edited my response. – Sandy G Feb 25 at 22:32
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i would use siunitx package:

\documentclass{article}
\usepackage{siunitx}

\begin{document}
correct: \SI{15 x 10.5}{mm}

your wish: \SI[product-units=single]{15 x 10.5}{mm\tothe2}
or \SI[product-units=single]{15 x 10.5}{mm^2}

\end{document}

enter image description here

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