In a trapezium EBCD with EB || DC, find angles a, b, and c given angle CDE = 58 degrees, angle EBC = 110 degrees, and angle BCD = 70 degrees.

The arrows on lines $EB$ and $DC$ indicate that $EB \parallel DC$. Therefore, $EBCD$ is a trapezium.
In a trapezium with parallel sides $EB$ and $DC$, the consecutive interior angles between the parallel sides and a transversal are supplementary.
For transversal $ED$: $\angle DEB + \angle CDE = 180^\circ$.
For transversal $BC$: $\angle EBC + \angle BCD = 180^\circ$.

Using the transversal $ED$:
$\angle DEB + \