If you fail, never give up because FAIL means 'First Attempt In Learning'.— A. P. J. Abdul Kalam

Lines and Angles — quick quiz

5 real SOF IMO questions on Lines and Angles. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 5

HARD

Two lines AB and CD intersect at point O. Line EF is parallel to AB and passes through a point on CD. If angle AOC measures 48 degrees, and angle between EF and CD (on the same side as angle AOC) measures x degrees, find the value of x.