\[\boxed{\mathbf{763\ (763)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{763}.\ }\]
\[\textbf{а)}\ S = 2 \cdot 4\ :2 = 4\ см^{2}.\]
\[\textbf{б)}\ S = 4 + 4 + 1 = 9\ см^{2}.\]
\[\textbf{в)}\ S = 2 \cdot 4 = 8\ см^{2}.\]
\[\textbf{г)}\ S = 4 + 2 + 2 = 8\ см^{2}.\]