In Fig 8.111, state which lines are parallel and why?

Question

Philoid · Accepted Answer

∠EOC = ∠DOK = 100^o(Vertically opposite angle)

∠DOK = ∠ACO = 100^o(Vertically opposite angle)

Here two lines, EK and CA cut by a third line L and the corresponding angles to it are equal.

Therefore,

EK ‖ AC