| To calculate angle and length |         | 
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 At a choice of polygon or linear objects for creation of a measuring triangle that piece of the metrics is chosen, which was the nearest to the cursor at the moment of a choice of object. As a result of an execution of operation the measuring triangle will be constructed. Values of lengths of the sides and corners of a triangle (internal and external) are displayed in a dialogue window. 
 Description of dialogue: Corners and distances. 
 
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