AB=4cm; DC=DG+GC=2+6=8cm; BG=2cm
\(S_{ABCD}=\dfrac{1}{2}\cdot\left(AB+CD\right)\cdot BG=\dfrac{1}{2}\cdot2\cdot\left(4+8\right)=12\left(cm^2\right)\)
DC=8cm; EF=DG=6cm; DH=2cm
\(S_{DGFE}=\dfrac{1}{2}\left(DG+EF\right)\cdot DH=\dfrac{1}{2}\cdot\left(8+6\right)\cdot2=14\left(cm^2\right)\)
=>\(S_{hình}=12+14=26\left(cm^2\right)\)