Two intersecting circles and four chords. Prove that the red chords are parallel.
Scroll down for a solution to this problem.
Solution

Poem
Lines in the sand
Written
And never end
As far as the eye can see
So exciting impressions
Traces slowly passing by
The foam of the sea constantly
Traces that the wind caresses
A 1000 words in tiny letters
And I love you in capital letters
Ephemeral promises
Lines in the sand
