\documentclass{standalone}
%
\usepackage{tikz}
\usetikzlibrary{backgrounds}
\usepackage{tkz-euclide}
\usetkzobj{all}
%
\usepackage{amsmath}
%
\usepackage{xcolor}
%
\definecolor{space}{HTML}{0A2543}
\definecolor{earth}{HTML}{0089FA}
\definecolor{moon}{HTML}{AFAFAF}
%
\title{Difference of two squares}
\begin{document}
	\begin{tikzpicture}[background rectangle/.style={fill=white},show background rectangle]
		\begin{scope}
			\tkzDefPoint(0,0){A}
			\tkzDefPoint(5,0){B}
			\tkzDefSquare(A,B)
			\tkzDrawSquare[color=space,fill=space](A,B)
			%
			\tkzDefPoint(3,0){C}
			\tkzDefSquare(A,C)
			\tkzDrawSquare[color=moon, opacity=0.5,fill=moon](A,C)
			%
			\tkzDefPoint(3,5){C1}
			\tkzDrawSegment[color=white, dashed](C,C1)
		\end{scope}
		%
		\begin{scope}[shift={(6,3)}]
			\tkzDefPoint(0,0){D}
			\tkzDefPoint(8,2){F}
			\tkzDefPoint(8,0){E}
			\tkzDefPoint(0,2){G}
			\tkzDrawPolygon[color=earth,fill=earth](D,E,F,G)
			%
			\tkzDefPoint(3,0){B1}
			\tkzDefPoint(3,2){B2}
			\tkzDrawSegment[color=white, dashed](B1,B2)
		\end{scope}
	\end{tikzpicture}
\end{document}