When surfaces with round or smooth contours blend together, the merging surface is called a(n):

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A runout is a merging surface of round or smooth contours, usually found in machined parts. An orthographic projection is a method of drawing a three-dimensional object in two dimensions using multiple views. A fold line is a line used to indicate where a part should be folded or bent. An ellipse is a closed, curved shape often found in geometry or art.

When Surfaces with Round or Smooth Contours Blend Together, the Merging