Question

In the figure, if lines l and m are parallel, then x=

Answer 1

In the figure, l||m

$\therefore \angle 1={65}^0$ (Corresponding angles)
In $\Delta BCD$,
Ext. $\angle 1=x+{20}^0$
$\Rightarrow {65}^0=x+{20}^0$
$\Rightarrow x={65}^0-{20}^0$
$\Rightarrow x={45}^0$