Calculating distances and angles
You can calculate the distance between any two points you select to determine the following information:
The distance between the points, measured in drawing units.
Their angle in the xy plane.
Their angle measured from the xy plane.
The change (delta) in the x, y, and z distances between the two points.
You can also determine the running total length of entities in a selection set.
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Calculating the distance between two points or entities