I am seeing a weird behavior in the textwidth in Latex. When I use \documentclass[a4paper]{article} the actual text width do not really all the \textwidth. I can see that if I use showframes in geometry. The problem does not occur in \documentclass[a4paper]{report}.
example 1:
\documentclass[a4paper]{article} % use larger type; default would be 10pt
\usepackage[top=1in, bottom=1in, left=0.5in, right=0.5in,showframe]{geometry} % to change the page dimensions top=1in, bottom=1in, left=0.5in, right=0.5in,
\usepackage{graphicx}
\usepackage{lipsum}
\usepackage{array}
\title{TEST}
\author{?}
\begin{document}
\maketitle
\abstract{???}
\tableofcontents
\newpage
\section{Introduction}\label{sec:Introdu}
\lipsum
\end{document}
example 2:
\documentclass[a4paper]{report} % use larger type; default would be 10pt
\usepackage[top=1in, bottom=1in, left=0.5in, right=0.5in,showframe]{geometry} % to change the page dimensions top=1in, bottom=1in, left=0.5in, right=0.5in,
\usepackage{graphicx}
\usepackage{lipsum}
\usepackage{array}
\title{TEST}
\author{?}
\begin{document}
\maketitle
\abstract{???}
\tableofcontents
\newpage
\section{Introduction}\label{sec:Introdu}
\lipsum
\end{document}

