$ \begin{cases}  OB=2 \\ OA=AB \end{cases} \Rightarrow OA =AB = \frac{\sqrt{2}}{2}\times 2 = \sqrt{2}=BC=CD \\ OC=\sqrt{(\sqrt{2})^2 + 2^2} = \sqrt{2+4} = \sqrt{6} \\ OD=\sqrt{(\sqrt{2})^2 + (\sqrt{6})^2} = \sqrt{2+6} = \sqrt{8} = 2\sqrt{2} \simeq 2 \times 2/14 =2/8 \\ H=1-2/8 = -1/8 \\ -2 \lt -1/8 \lt -1 $