COORDINATE GEOMETRY / POINT DISTANCE
Measure straight-line Euclidean distance between two Cartesian points with signed horizontal and vertical changes.
Use boundary
Coordinate differences form perpendicular legs, and the Pythagorean theorem gives the segment length.
Distance = sqrt((x2 - x1)^2 + (y2 - y1)^2).
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What you receive
Use boundary
This is planar Euclidean distance; do not use it directly for long geographic paths or coordinates with different units.
Results are educational math aids. Check notation, units, rounding, assumptions, and required precision before using an answer in graded, engineering, financial, or safety-critical work.