Find the length of the polar curve. 
Definitions:
Negative Reinforcement
A behavioral concept where the removal of an unpleasant stimulus following a desired behavior increases the likelihood of that behavior being repeated in the future.
Punishment
A process in which a response is followed by a stimulus that decreases the likelihood of that response being repeated.
Undesirable Behaviours
Actions or reactions that are not wanted or are considered negative by society, a group, or an individual.
Strengthens
To increase in power, magnitude, or effectiveness.
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