Square with a Compass

Construct a square with only a compass and a straightedge.

Construct a 2 inch square with only a compass and a straightedge, with the
compass stuck at a distance of 2 inches.

Mark the four corners of a square using only a compass.
For each problem, try to use a minimum number of steps (lines, marks, etc.)
Source: rec.puzzles, Original, Henry Ernest Dudeny.
Solution
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