SOF IMO · Lines and Angles · 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
MEDIUMIn the figure, lines AB and CD intersect at O. If ∠AOC = 3x + 10° and ∠BOD = 5x - 30°, what is the value of x?