Ah, the distance formula! To check if three points are collinear, find the distances between each pair. If the largest distance equals the sum of the two smaller ones, they lie on a straight line. But bhala, I haven't done this by hand since my driving school days—now my fare-calculator app does all the measuring for me. It’s practical, but sometimes I feel santusta knowing the old math, like checking my map before trusting the GPS blindly.
#exams#study
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