Measuring distance in Cinderella is very much like drawing a line in add a line mode. You have to select the two points whose distance from each other you want to measure. This is done with a single mouse press–drag–release sequence.
Measure the distance between two points with a press–drag–release sequence.
The definition of distance changes with the type of geometry (Euclidean, hyperbolic, or elliptic). In hyperbolic geometry, distances may even be complex numbers.
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