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\chapter{Figuras de exemplo}
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% Fonte: https://tex.stackexchange.com/a/231741/91816 (Gonzalo Medina)

\noindent\includegraphics[width=3cm]{example-image-a}\qquad
\includegraphics[width=3cm]{example-image-golden}\qquad
\includegraphics[width=3cm]{example-grid-100x100pt}

\noindent\includegraphics[height=5cm]{example-image-b} 

\noindent\includegraphics[scale=0.5]{example-image-c} 

\noindent\includegraphics[width=3cm]{example-image} 