Question

In the given figure, state which lines are parallel and why?

Answer 1

Let, F be the point of intersection of the line CD and the line passing through point E.

Here, ∠ACD and ∠CDE are alternate and equal angles.

So, ∠ACD = ∠CDE = 100^o

Therefore, AC ∥ EF
$\left[2Mark\right]$