how to measure the curavature radius on 2d car profile in catia v5?

i have designed 2d car profile by importing blueprints in sketch tracer after that in free style i have drawn outer curvature by using 3d curve my problem is to measure that curvature please help to overcome this problem. thank you

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There is a command for this purpose in free style module.

Find this command "Porcupine Curvature Analysis".

 
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