\[\begin{align*} \angle 1 &= \square {}^{\circ}; \\ \angle 2 &= \square {}^{\circ}; \\ \angle 3 &= \square {}^{\circ}; \\ \angle 4 &= \square {}^{\circ}; \\ \angle 5 &= \square {}^{\circ}; \\ \angle 6 &= \square {}^{\circ}; \\ \angle 7 &= \square {}^{\circ}; \\ \angle 8 &= \square {}^{\circ}. \end{align*}\]