One characteristic of a line is that the length continues on forever.
You can only find the length of a line segment.
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I think that you draw a square from that line, and find the area of that square.
To find the perimeter of any shape, simply add the lengths of the individual line segments together. To find the length of an individual line segment (x1,y1)-(x2,y2) simply compute the square root of (x1-x2)2 + (y1-y2)2.
Count the dots
Use the Pythagorean Theorem.
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