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en:processing:protractor [2012/03/14 15:34] (current)
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 +===== Measuring Angles =====
 +Instrument for measuring angles between segments in //XY// plane - protractor - is in the [[image_toolbar|Image toolbar]]:
 +It allows you to measure the angle between two vectors, which were consistently set with the mouse on the image.
 +Press the left mouse button to specify the beginning of the first segment, holding the mouse button draw a line segment to the end point of the first vector. Similarly, specify the second vector. Beginnings of the vectors will be shown in red, and the ends in green.
 +Immediately after you have built the second vector, the measured angle will be displayed on the image:
 +If you want to save this value to the clipboard, use functions [[..:​edit:​copy_text|Copy text]] or [[..:​edit:​add_text|Add text]].
 +Once you select a starting point for the next run, the measured values ​​will be lost.