The line $n$ is transversal to line $l$ and $m$ in Figure. Identify the angle alternate to $\angle 13$, angle corresponding to$\angle 15$ and angle alternate to$\angle 15$.

 

In Figure, line $l\parallel m$ and $n$ is a transversal. If$\angle 1=40°$, find all the angles and check that all corresponding angles and alternate angles are equal.

In Figure, line $l\parallel m$ and a transversal $n$ cuts them at $P$ and $Q$ respectively. If $\angle 1=75°$, find all other angles.

In Figure, $AB\parallel CD$ and a transversal $PQ$ cuts them at $L$ and $M$ respectively. If $\angle QMD=100°$, find all other angles.

In Figure, $l\left|\right|m$ and $p\left|\right|q$. Find the values of $x, y, z, t$.

In Figure, line $l \left|\right| m, \angle 1 = 120°$ and $\angle 2= 100°,$ find out $\angle 3$ and $\angle 4$.