In taxicab geometry, Euclidean distance for a point and a point is replaced by Manhattan distance and the shape of circles may change as well.
What is the shape of taxicab circles?
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A circle is a set of points with a fixed distance, so the formula for the circle of radius r centered at the orgin in taxicab geometry is ∣ x ∣ + ∣ y ∣ = r in Cartesian coordianates whose graph is a square , as shown in the picture.