Hi there!
I’m struggling to understand why angle ∠PCQ cannot be 90°. The explanation in the solution doesn’t make sense to me. It mentions that it’s not a tangent line, but tangents are usually relevant when discussing the angle between a radius (from the center to the point of tangency) and the tangent itself.
From my perspective, it seems entirely possible for ∠PCQ to be 90°, for example, if points P, C, and Q form a 45°–45°–90° triangle. Could you please clarify why this configuration is supposedly impossible?
Thanks in advance!